Where the dates come from
Official calendar rules, astronomical dates and our own arithmetic.
Updated
What a day count means
A days-until count leaves today out and includes your target date. Sleeps means the nights before it arrives. A count between two dates leaves the end date out unless you choose to include it.
Weekdays are Monday through Friday, including holidays. Working days also remove the holidays and weekend days you select. Our US federal calendar follows the standard federal workweek; state holidays, employer schedules and one-off closures can differ.
For an exact countdown, we compare your chosen instant with your device’s clock. A day on the calendar can be shorter or longer than a full day of elapsed time when the clocks change.
Month ends, birthdays and weeks
Adding months or years keeps the day of the month when possible. Otherwise, the result uses the last day of the target month. A leap-day birthday uses the last day of February in a non-leap year. These are counting conventions, not decisions about legal age.
ISO weeks start on Monday, and the first Thursday belongs to week one. Our Sunday-start comparison uses the week containing January 1 as week one. Historical dates use the Gregorian calendar, even before its local adoption.
Holiday dates
Federal holiday rules come from US law and the Office of Personnel Management. Other observances follow the official references listed below. Holiday countdowns use the actual date, while the working-day calculator uses the observed day off.
No matching holiday. Try part of its name.
New Year's Day · the United States
New Year's Day falls on January 1. Included in this jurisdiction’s working-day calendar.
Birthday of Martin Luther King, Jr. · the United States
Birthday of Martin Luther King, Jr. falls on the third Monday in January. Included in this jurisdiction’s working-day calendar.
Washington's Birthday · the United States
Washington's Birthday falls on the third Monday in February. Included in this jurisdiction’s working-day calendar.
Memorial Day · the United States
Memorial Day falls on the last Monday in May. Included in this jurisdiction’s working-day calendar.
Juneteenth National Independence Day · the United States
Juneteenth National Independence Day falls on June 19. Included in this jurisdiction’s working-day calendar.
Independence Day · the United States
Independence Day falls on July 4. Included in this jurisdiction’s working-day calendar.
Labor Day · the United States
Labor Day falls on the first Monday in September. Included in this jurisdiction’s working-day calendar.
Columbus Day · the United States
Columbus Day falls on the second Monday in October. Included in this jurisdiction’s working-day calendar.
Veterans Day · the United States
Veterans Day falls on November 11. Included in this jurisdiction’s working-day calendar.
Thanksgiving Day · the United States
Thanksgiving Day falls on the fourth Thursday in November. Included in this jurisdiction’s working-day calendar.
Christmas Day · the United States
Christmas Day falls on December 25. Included in this jurisdiction’s working-day calendar.
Easter Sunday · the United States
This date follows Gregorian Easter Sunday. An observance, not a day removed by this working-day calendar.
Halloween · the United States
Halloween falls on October 31. An observance, not a day removed by this working-day calendar.
Black Friday · the United States
Black Friday is 1 calendar day after Thanksgiving Day. An observance, not a day removed by this working-day calendar.
New Year's Day · England and Wales
New Year's Day falls on January 1. Included in this jurisdiction’s working-day calendar.
Good Friday · England and Wales
This date is 2 calendar days before Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Early May bank holiday · England and Wales
Early May bank holiday falls on the first Monday in May. Included in this jurisdiction’s working-day calendar.
Spring bank holiday · England and Wales
Spring bank holiday falls on the last Monday in May. Included in this jurisdiction’s working-day calendar.
Summer bank holiday · England and Wales
Summer bank holiday falls on the last Monday in August. Included in this jurisdiction’s working-day calendar.
Christmas Day · England and Wales
Christmas Day falls on December 25. Included in this jurisdiction’s working-day calendar.
Boxing Day · England and Wales
Boxing Day falls on December 26. Included in this jurisdiction’s working-day calendar.
Easter Monday · England and Wales
This date is 1 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
New Year's Day · Scotland
New Year's Day falls on January 1. Included in this jurisdiction’s working-day calendar.
2nd January · Scotland
2nd January falls on January 2. Included in this jurisdiction’s working-day calendar.
Good Friday · Scotland
This date is 2 calendar days before Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Early May bank holiday · Scotland
Early May bank holiday falls on the first Monday in May. Included in this jurisdiction’s working-day calendar.
Spring bank holiday · Scotland
Spring bank holiday falls on the last Monday in May. Included in this jurisdiction’s working-day calendar.
Summer bank holiday · Scotland
Summer bank holiday falls on the first Monday in August. Included in this jurisdiction’s working-day calendar.
St Andrew's Day · Scotland
St Andrew's Day falls on November 30. Included in this jurisdiction’s working-day calendar.
Christmas Day · Scotland
Christmas Day falls on December 25. Included in this jurisdiction’s working-day calendar.
Boxing Day · Scotland
Boxing Day falls on December 26. Included in this jurisdiction’s working-day calendar.
World Cup bank holiday · Scotland
This was a one-off holiday on 2026-06-15. Included in this jurisdiction’s working-day calendar.
New Year's Day · Northern Ireland
New Year's Day falls on January 1. Included in this jurisdiction’s working-day calendar.
Good Friday · Northern Ireland
This date is 2 calendar days before Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Early May bank holiday · Northern Ireland
Early May bank holiday falls on the first Monday in May. Included in this jurisdiction’s working-day calendar.
Spring bank holiday · Northern Ireland
Spring bank holiday falls on the last Monday in May. Included in this jurisdiction’s working-day calendar.
Summer bank holiday · Northern Ireland
Summer bank holiday falls on the last Monday in August. Included in this jurisdiction’s working-day calendar.
Christmas Day · Northern Ireland
Christmas Day falls on December 25. Included in this jurisdiction’s working-day calendar.
Boxing Day · Northern Ireland
Boxing Day falls on December 26. Included in this jurisdiction’s working-day calendar.
St Patrick's Day · Northern Ireland
St Patrick's Day falls on March 17. Included in this jurisdiction’s working-day calendar.
Easter Monday · Northern Ireland
This date is 1 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Battle of the Boyne · Northern Ireland
Battle of the Boyne falls on July 12. Included in this jurisdiction’s working-day calendar.
New Year's Day · Canada
New Year's Day falls on January 1. Included in this jurisdiction’s working-day calendar.
Good Friday · Canada
This date is 2 calendar days before Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Victoria Day · Canada
Victoria Day falls on the Monday before May 25. Included in this jurisdiction’s working-day calendar.
Canada Day · Canada
Canada Day falls on July 1. Included in this jurisdiction’s working-day calendar.
Labour Day · Canada
Labour Day falls on the first Monday in September. Included in this jurisdiction’s working-day calendar.
National Day for Truth and Reconciliation · Canada
National Day for Truth and Reconciliation falls on September 30. Included in this jurisdiction’s working-day calendar.
Thanksgiving Day · Canada
Thanksgiving Day falls on the second Monday in October. Included in this jurisdiction’s working-day calendar.
Remembrance Day · Canada
Remembrance Day falls on November 11. Included in this jurisdiction’s working-day calendar.
Christmas Day · Canada
Christmas Day falls on December 25. Included in this jurisdiction’s working-day calendar.
Boxing Day · Canada
Boxing Day falls on December 26. Included in this jurisdiction’s working-day calendar.
New Year's Day · Australia
New Year's Day falls on January 1. Included in this jurisdiction’s working-day calendar.
Australia Day · Australia
Australia Day falls on January 26. Included in this jurisdiction’s working-day calendar.
Good Friday · Australia
This date is 2 calendar days before Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Easter Monday · Australia
This date is 1 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Anzac Day · Australia
Anzac Day falls on April 25. Included in this jurisdiction’s working-day calendar.
Christmas Day · Australia
Christmas Day falls on December 25. Included in this jurisdiction’s working-day calendar.
Boxing Day · Australia
Boxing Day falls on December 26. Included in this jurisdiction’s working-day calendar.
New Year's Day · Brazil
New Year's Day falls on January 1. Included in this jurisdiction’s working-day calendar.
Easter Sunday · Brazil
This date follows Gregorian Easter Sunday. An observance, not a day removed by this working-day calendar.
Tiradentes Day · Brazil
Tiradentes Day falls on April 21. Included in this jurisdiction’s working-day calendar.
Labour Day · Brazil
Labour Day falls on May 1. Included in this jurisdiction’s working-day calendar.
Independence Day · Brazil
Independence Day falls on September 7. Included in this jurisdiction’s working-day calendar.
Our Lady of Aparecida · Brazil
Our Lady of Aparecida falls on October 12. Included in this jurisdiction’s working-day calendar.
All Souls' Day · Brazil
All Souls' Day falls on November 2. Included in this jurisdiction’s working-day calendar.
Republic Proclamation Day · Brazil
Republic Proclamation Day falls on November 15. Included in this jurisdiction’s working-day calendar.
Black Consciousness Day · Brazil
Black Consciousness Day falls on November 20. Included in this jurisdiction’s working-day calendar.
Christmas Day · Brazil
Christmas Day falls on December 25. Included in this jurisdiction’s working-day calendar.
New Year's Day · Italy
New Year's Day falls on January 1. Included in this jurisdiction’s working-day calendar.
Epiphany · Italy
Epiphany falls on January 6. Included in this jurisdiction’s working-day calendar.
Easter Sunday · Italy
This date follows Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Easter Monday · Italy
This date is 1 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Liberation Day · Italy
Liberation Day falls on April 25. Included in this jurisdiction’s working-day calendar.
Labour Day · Italy
Labour Day falls on May 1. Included in this jurisdiction’s working-day calendar.
Republic Day · Italy
Republic Day falls on June 2. Included in this jurisdiction’s working-day calendar.
Assumption Day · Italy
Assumption Day falls on August 15. Included in this jurisdiction’s working-day calendar.
All Saints' Day · Italy
All Saints' Day falls on November 1. Included in this jurisdiction’s working-day calendar.
Immaculate Conception · Italy
Immaculate Conception falls on December 8. Included in this jurisdiction’s working-day calendar.
Christmas Day · Italy
Christmas Day falls on December 25. Included in this jurisdiction’s working-day calendar.
St Stephen's Day · Italy
St Stephen's Day falls on December 26. Included in this jurisdiction’s working-day calendar.
New Year's Day · Germany
New Year's Day falls on January 1. Included in this jurisdiction’s working-day calendar.
Good Friday · Germany
This date is 2 calendar days before Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Easter Sunday · Germany
This date follows Gregorian Easter Sunday. An observance, not a day removed by this working-day calendar.
Easter Monday · Germany
This date is 1 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Labour Day · Germany
Labour Day falls on May 1. Included in this jurisdiction’s working-day calendar.
Ascension Day · Germany
This date is 39 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Whit Monday · Germany
This date is 50 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
German Unity Day · Germany
German Unity Day falls on October 3. Included in this jurisdiction’s working-day calendar.
Christmas Day · Germany
Christmas Day falls on December 25. Included in this jurisdiction’s working-day calendar.
Second Day of Christmas · Germany
Second Day of Christmas falls on December 26. Included in this jurisdiction’s working-day calendar.
New Year's Day · Metropolitan France
New Year's Day falls on January 1. Included in this jurisdiction’s working-day calendar.
Easter Sunday · Metropolitan France
This date follows Gregorian Easter Sunday. An observance, not a day removed by this working-day calendar.
Easter Monday · Metropolitan France
This date is 1 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Labour Day · Metropolitan France
Labour Day falls on May 1. Included in this jurisdiction’s working-day calendar.
Victory in Europe Day · Metropolitan France
Victory in Europe Day falls on May 8. Included in this jurisdiction’s working-day calendar.
Ascension Day · Metropolitan France
This date is 39 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Whit Monday · Metropolitan France
This date is 50 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
French National Day · Metropolitan France
French National Day falls on July 14. Included in this jurisdiction’s working-day calendar.
Assumption Day · Metropolitan France
Assumption Day falls on August 15. Included in this jurisdiction’s working-day calendar.
All Saints' Day · Metropolitan France
All Saints' Day falls on November 1. Included in this jurisdiction’s working-day calendar.
Armistice Day · Metropolitan France
Armistice Day falls on November 11. Included in this jurisdiction’s working-day calendar.
Christmas Day · Metropolitan France
Christmas Day falls on December 25. Included in this jurisdiction’s working-day calendar.
New Year's Day · Spain
New Year's Day falls on January 1. Included in this jurisdiction’s working-day calendar.
Epiphany · Spain
Epiphany falls on January 6. An observance, not a day removed by this working-day calendar.
Good Friday · Spain
This date is 2 calendar days before Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Labour Day · Spain
Labour Day falls on May 1. Included in this jurisdiction’s working-day calendar.
Assumption Day · Spain
Assumption Day falls on August 15. Included in this jurisdiction’s working-day calendar.
National Day of Spain · Spain
National Day of Spain falls on October 12. Included in this jurisdiction’s working-day calendar.
All Saints' Day · Spain
All Saints' Day falls on November 1. Included in this jurisdiction’s working-day calendar.
Constitution Day · Spain
Constitution Day falls on December 6. Included in this jurisdiction’s working-day calendar.
Immaculate Conception · Spain
Immaculate Conception falls on December 8. Included in this jurisdiction’s working-day calendar.
Christmas Day · Spain
Christmas Day falls on December 25. Included in this jurisdiction’s working-day calendar.
New Year's Day · Poland
New Year's Day falls on January 1. Included in this jurisdiction’s working-day calendar.
Epiphany · Poland
Epiphany falls on January 6. Included in this jurisdiction’s working-day calendar.
Easter Sunday · Poland
This date follows Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Easter Monday · Poland
This date is 1 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Labour Day · Poland
Labour Day falls on May 1. Included in this jurisdiction’s working-day calendar.
Constitution Day · Poland
Constitution Day falls on May 3. Included in this jurisdiction’s working-day calendar.
Pentecost · Poland
This date is 49 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Corpus Christi · Poland
This date is 60 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Assumption Day · Poland
Assumption Day falls on August 15. Included in this jurisdiction’s working-day calendar.
All Saints' Day · Poland
All Saints' Day falls on November 1. Included in this jurisdiction’s working-day calendar.
National Independence Day · Poland
National Independence Day falls on November 11. Included in this jurisdiction’s working-day calendar.
Christmas Eve · Poland
Christmas Eve falls on December 24. Included in this jurisdiction’s working-day calendar.
Christmas Day · Poland
Christmas Day falls on December 25. Included in this jurisdiction’s working-day calendar.
Second Day of Christmas · Poland
Second Day of Christmas falls on December 26. Included in this jurisdiction’s working-day calendar.
New Year's Day · Romania
New Year's Day falls on January 1. Included in this jurisdiction’s working-day calendar.
Second day after New Year · Romania
Second day after New Year falls on January 2. Included in this jurisdiction’s working-day calendar.
Epiphany · Romania
Epiphany falls on January 6. Included in this jurisdiction’s working-day calendar.
Saint John the Baptist · Romania
Saint John the Baptist falls on January 7. Included in this jurisdiction’s working-day calendar.
Union of the Romanian Principalities · Romania
Union of the Romanian Principalities falls on January 24. Included in this jurisdiction’s working-day calendar.
Labour Day · Romania
Labour Day falls on May 1. Included in this jurisdiction’s working-day calendar.
Children's Day · Romania
Children's Day falls on June 1. Included in this jurisdiction’s working-day calendar.
Dormition of the Mother of God · Romania
Dormition of the Mother of God falls on August 15. Included in this jurisdiction’s working-day calendar.
Saint Andrew · Romania
Saint Andrew falls on November 30. Included in this jurisdiction’s working-day calendar.
National Day of Romania · Romania
National Day of Romania falls on December 1. Included in this jurisdiction’s working-day calendar.
Christmas Day · Romania
Christmas Day falls on December 25. Included in this jurisdiction’s working-day calendar.
Second Day of Christmas · Romania
Second Day of Christmas falls on December 26. Included in this jurisdiction’s working-day calendar.
Good Friday · Romania (Western)
This date is 2 calendar days before Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Easter Sunday · Romania (Western)
This date follows Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Easter Monday · Romania (Western)
This date is 1 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Pentecost Sunday · Romania (Western)
This date is 49 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Pentecost Monday · Romania (Western)
This date is 50 calendar days after Gregorian Easter Sunday. Included in this jurisdiction’s working-day calendar.
Good Friday · Romania (Orthodox)
This date is 2 calendar days before Orthodox Easter Sunday. Included in this jurisdiction’s working-day calendar.
Easter Sunday · Romania (Orthodox)
This date follows Orthodox Easter Sunday. Included in this jurisdiction’s working-day calendar.
Easter Monday · Romania (Orthodox)
This date is 1 calendar days after Orthodox Easter Sunday. Included in this jurisdiction’s working-day calendar.
Pentecost Sunday · Romania (Orthodox)
This date is 49 calendar days after Orthodox Easter Sunday. Included in this jurisdiction’s working-day calendar.
Pentecost Monday · Romania (Orthodox)
This date is 50 calendar days after Orthodox Easter Sunday. Included in this jurisdiction’s working-day calendar.
Valentine's Day · the United States
Valentine's Day falls on February 14. An observance, not a day removed by this working-day calendar.
Christmas Eve · the United States
Christmas Eve falls on December 24. An observance, not a day removed by this working-day calendar.
Mother's Day · the United States
Mother's Day falls on the second Sunday in May. An observance, not a day removed by this working-day calendar.
Father's Day · the United States
Father's Day falls on the third Sunday in June. An observance, not a day removed by this working-day calendar.
Grandparents Day · the United States
Grandparents Day is 6 calendar days after Labor Day. An observance, not a day removed by this working-day calendar.
St Patrick's Day · the United States
St Patrick's Day falls on March 17. An observance, not a day removed by this working-day calendar.
Mardi Gras · the United States
This date is 47 calendar days before Gregorian Easter Sunday. An observance, not a day removed by this working-day calendar.
Ash Wednesday · the United States
This date is 46 calendar days before Gregorian Easter Sunday. An observance, not a day removed by this working-day calendar.
Good Friday · the United States
This date is 2 calendar days before Gregorian Easter Sunday. An observance, not a day removed by this working-day calendar.
Palm Sunday · the United States
This date is 7 calendar days before Gregorian Easter Sunday. An observance, not a day removed by this working-day calendar.
Easter Monday · the United States
This date is 1 calendar days after Gregorian Easter Sunday. An observance, not a day removed by this working-day calendar.
Earth Day · the United States
Earth Day falls on April 22. An observance, not a day removed by this working-day calendar.
Groundhog Day · the United States
Groundhog Day falls on February 2. An observance, not a day removed by this working-day calendar.
Day of the Dead · the United States
Day of the Dead falls on November 1. An observance, not a day removed by this working-day calendar.
Cinco de Mayo · the United States
Cinco de Mayo falls on May 5. An observance, not a day removed by this working-day calendar.
Mexican Independence Day · the United States
Mexican Independence Day falls on September 16. An observance, not a day removed by this working-day calendar.
Pride Month · the United States
Pride Month falls on June 1. An observance, not a day removed by this working-day calendar.
Black History Month · the United States
Black History Month falls on February 1. An observance, not a day removed by this working-day calendar.
Breast Cancer Awareness Month · the United States
Breast Cancer Awareness Month falls on October 1. An observance, not a day removed by this working-day calendar.
Cyber Monday · the United States
Cyber Monday is 4 calendar days after Thanksgiving Day. An observance, not a day removed by this working-day calendar.
Tax Day · the United States
The usual federal deadline is April 15, moved to the next day that is neither a weekend nor the observed DC Emancipation Day. An observance, not a day removed by this working-day calendar.
Teacher Appreciation Week · the United States
Teacher Appreciation Week falls on the first Sunday in May. An observance, not a day removed by this working-day calendar.
Original holiday references
- uscode.house.gov
Updated September 19, 2026 · Public domain as a work of the United States Government (17 U.S.C. 105) - aa.usno.navy.mil
Updated September 20, 2026 · Gregorian Easter arithmetic from the US Naval Observatory; related observance rules adapted from date-holidays, CC BY-SA 3.0, https://github.com/commenthol/date-holidays. - www.census.gov
Updated September 19, 2026 · Public domain as a work of the United States Government (17 U.S.C. 105) - www.census.gov
Updated September 19, 2026 · Public domain as a work of the United States Government (17 U.S.C. 105) - www.gov.uk
Updated September 19, 2026 · Open Government Licence v3.0 - laws-lois.justice.gc.ca
Updated September 19, 2026 · Open Government Licence - Canada - github.com
Updated September 19, 2026 · CC BY-SA 3.0 - github.com
Updated September 19, 2026 · CC BY-SA 3.0 - github.com
Updated September 19, 2026 · CC BY-SA 3.0 - www.gesetze-im-internet.de
Updated September 19, 2026 · Official work not protected by copyright under section 5 UrhG - github.com
Updated September 19, 2026 · CC BY-SA 3.0 - www.legifrance.gouv.fr
Updated September 19, 2026 · Licence Ouverte / Open Licence 2.0 - github.com
Updated September 19, 2026 · CC BY-SA 3.0 - www.boe.es
Updated September 19, 2026 · BOE legal notice permits reproduction with source attribution and no alteration - isap.sejm.gov.pl
Updated September 19, 2026 · Official normative act excluded from copyright by article 4 of Poland's copyright act - github.com
Updated September 19, 2026 · CC BY-SA 3.0 - www.census.gov
Updated September 19, 2026 · Public domain calendar fact from a United States Government source - www.nps.gov
Updated September 19, 2026 · Public domain calendar fact from a United States Government source - uscode.house.gov
Updated September 20, 2026 · Public calendar fact; original wording and arithmetic. U.S. Government sources are public domain under 17 USC 105. - uscode.house.gov
Updated September 20, 2026 · Public calendar fact; original wording and arithmetic. U.S. Government sources are public domain under 17 USC 105. - uscode.house.gov
Updated September 20, 2026 · Public calendar fact; original wording and arithmetic. U.S. Government sources are public domain under 17 USC 105. - www.loc.gov
Updated September 20, 2026 · Public calendar fact; original wording and arithmetic. U.S. Government sources are public domain under 17 USC 105. - www.loc.gov
Updated September 20, 2026 · Public calendar fact; original wording and arithmetic. U.S. Government sources are public domain under 17 USC 105. - americanhistory.si.edu
Updated September 20, 2026 · Public calendar fact; original wording and arithmetic. U.S. Government sources are public domain under 17 USC 105. - www.si.edu
Updated September 20, 2026 · Public calendar fact; original wording and arithmetic. U.S. Government sources are public domain under 17 USC 105. - www.loc.gov
Updated September 20, 2026 · Public calendar fact; original wording and arithmetic. U.S. Government sources are public domain under 17 USC 105. - blogs.loc.gov
Updated September 20, 2026 · Public calendar fact; original wording and arithmetic. U.S. Government sources are public domain under 17 USC 105. - www.loc.gov
Updated September 20, 2026 · Public calendar fact; original wording and arithmetic. U.S. Government sources are public domain under 17 USC 105. - www.nrfbigshoweurope.com
Updated September 20, 2026 · Individual calendar fact, expressed in original wording and arithmetic. National Retail Federation event publication; no source prose reproduced. - www.irs.gov
Updated September 20, 2026 · Published calendar rule expressed in original arithmetic. Individual factual date; no source prose reproduced. - www.pta.org
Updated September 20, 2026 · Published calendar rule expressed in original arithmetic. Individual factual date; no source prose reproduced.
Religious and lunar calendars
These are the dates announced by the named calendar authority, through 2030. Islamic starts remain subject to local moon sighting. Jewish dates begin at local sundown; our day count does not claim an exact sunset time. Diwali and Lunar New Year follow the specific calendars named below.
Passover
Hebcal. Begins at local sundown on the date shown. This calendar-day count is not a countdown to the exact sunset.
- www.hebcal.com · Updated September 20, 2026
Hebcal content is licensed under Creative Commons Attribution 4.0 International.
Rosh Hashanah
Hebcal. Begins at local sundown on the date shown. This calendar-day count is not a countdown to the exact sunset.
- www.hebcal.com · Updated September 20, 2026
Hebcal content is licensed under Creative Commons Attribution 4.0 International.
Yom Kippur
Hebcal. Begins at local sundown on the date shown. This calendar-day count is not a countdown to the exact sunset.
- www.hebcal.com · Updated September 20, 2026
Hebcal content is licensed under Creative Commons Attribution 4.0 International.
Hanukkah
Hebcal. Begins at local sundown on the date shown. This calendar-day count is not a countdown to the exact sunset.
- www.hebcal.com · Updated September 20, 2026
Hebcal content is licensed under Creative Commons Attribution 4.0 International.
Ramadan
Türkiye Presidency of Religious Affairs (Diyanet). Expected to begin on the evening shown under the Diyanet calendar. Moon sighting and the calendar authority followed can move the start by a day by country. Confirm your local community’s date.
- vakithesaplama.diyanet.gov.tr · Updated September 20, 2026
Individual publicly announced calendar dates, transcribed in our own format; no source prose or compiled calendar is republished.
- vakithesaplama.diyanet.gov.tr · Updated September 20, 2026
Individual publicly announced calendar dates, transcribed in our own format; no source prose or compiled calendar is republished.
- vakithesaplama.diyanet.gov.tr · Updated September 20, 2026
Individual publicly announced calendar dates, transcribed in our own format; no source prose or compiled calendar is republished.
- vakithesaplama.diyanet.gov.tr · Updated September 20, 2026
Individual publicly announced calendar dates, transcribed in our own format; no source prose or compiled calendar is republished.
- vakithesaplama.diyanet.gov.tr · Updated September 20, 2026
Individual publicly announced calendar dates, transcribed in our own format; no source prose or compiled calendar is republished.
Eid al-Fitr
Türkiye Presidency of Religious Affairs (Diyanet). Expected to begin on the evening shown under the Diyanet calendar. Moon sighting and the calendar authority followed can move the start by a day by country. Confirm your local community’s date.
- vakithesaplama.diyanet.gov.tr · Updated September 20, 2026
Individual publicly announced calendar dates, transcribed in our own format; no source prose or compiled calendar is republished.
- vakithesaplama.diyanet.gov.tr · Updated September 20, 2026
Individual publicly announced calendar dates, transcribed in our own format; no source prose or compiled calendar is republished.
- vakithesaplama.diyanet.gov.tr · Updated September 20, 2026
Individual publicly announced calendar dates, transcribed in our own format; no source prose or compiled calendar is republished.
- vakithesaplama.diyanet.gov.tr · Updated September 20, 2026
Individual publicly announced calendar dates, transcribed in our own format; no source prose or compiled calendar is republished.
- vakithesaplama.diyanet.gov.tr · Updated September 20, 2026
Individual publicly announced calendar dates, transcribed in our own format; no source prose or compiled calendar is republished.
Eid al-Adha
Türkiye Presidency of Religious Affairs (Diyanet). Expected to begin on the evening shown under the Diyanet calendar. Moon sighting and the calendar authority followed can move the start by a day by country. Confirm your local community’s date.
- vakithesaplama.diyanet.gov.tr · Updated September 20, 2026
Individual publicly announced calendar dates, transcribed in our own format; no source prose or compiled calendar is republished.
- vakithesaplama.diyanet.gov.tr · Updated September 20, 2026
Individual publicly announced calendar dates, transcribed in our own format; no source prose or compiled calendar is republished.
- vakithesaplama.diyanet.gov.tr · Updated September 20, 2026
Individual publicly announced calendar dates, transcribed in our own format; no source prose or compiled calendar is republished.
- vakithesaplama.diyanet.gov.tr · Updated September 20, 2026
Individual publicly announced calendar dates, transcribed in our own format; no source prose or compiled calendar is republished.
- vakithesaplama.diyanet.gov.tr · Updated September 20, 2026
Individual publicly announced calendar dates, transcribed in our own format; no source prose or compiled calendar is republished.
Lunar New Year
Hong Kong Observatory. Uses the first day of the first month in the Chinese calendar published by Hong Kong Observatory. Other lunar new-year traditions can follow a different calendar.
- data.gov.hk · Updated September 20, 2026
Hong Kong Observatory and HKSAR Government, via DATA.GOV.HK. Open data permits commercial and non-commercial reuse with attribution.
- www.hko.gov.hk · Updated September 20, 2026
Individual calendar date cross-check; publication artwork and tables are not reproduced.
- www.hko.gov.hk · Updated September 20, 2026
Individual calendar date cross-check; publication artwork and tables are not reproduced.
Diwali
Dilip Nath’s calendar submitted to the New York City Council. Dates follow the calendar in Dilip Nath’s New York City Council testimony. The observance can differ by a day with location, tradition and the calendar authority followed; confirm with your local temple.
- legistar.council.nyc.gov · Updated September 20, 2026
Five individual calendar facts from public council testimony; no testimony wording, artwork or compiled table is reproduced.
- www.hinduamerican.org · Updated September 20, 2026
Hindu American Foundation date cross-check through 2028; no toolkit content reproduced.
The arithmetic behind the answer
aa.usno.navy.mil
Gregorian leap years and month lengths
USNO Gregorian calendar rules · Updated September 19, 2026 · Government calendar facts
howardhinnant.github.io
Counting days between two calendar dates
Civil-date arithmetic by Howard Hinnant · Updated September 19, 2026 · Public-domain algorithm
tc39.es
Adding months and years, including month ends, and counting age in years, months and days
Month and year counting conventions · Updated September 19, 2026 · Our own arithmetic, following these counting conventions
tc39.es
Named timezones, nonexistent and repeated local times
Timezone and repeated-time conventions · Updated September 19, 2026 · The date library uses the ISC licence
www.loc.gov
ISO weekday and week-year definitions; Sunday-start alternative is explicitly defined by this site
ISO weekday and week-year definitions · Updated September 19, 2026 · Publicly available definition; no document reproduced
www.bipm.org
Minutes and hours follow the standard time units. Weeks are counted as seven days; months and years in the converter use the mean Gregorian length and are labelled approximate.
BIPM definitions of minutes, hours and days · Updated September 19, 2026 · Published unit definitions; derived figures are our arithmetic
github.com
Sunrise, twilight and global eclipse calculations; local viewing circumstances are not predicted.
Astronomy Engine methods and accuracy · Updated September 19, 2026 · MIT licence, Don Cross
aa.usno.navy.mil
Julian Date starts at noon Universal Time; Modified Julian Date subtracts 2,400,000.5. Calendar conversions are our own arithmetic.
USNO Julian Date conventions · Updated September 19, 2026 · Government calendar facts
eclipse.gsfc.nasa.gov
Independent date checks for computed lunar eclipses.
NASA lunar eclipse table · Updated September 19, 2026 · Eclipse Predictions by Fred Espenak, NASA's GSFC; reproduction allowed with acknowledgement
Worked examples use the dates and choices shown beside them. Their totals are calculated by us.
Equinoxes and solstices
The US Naval Observatory provides the Northern Hemisphere season times for 2026 through 2031. We convert each published time to your selected timezone. The times have minute precision; Universal Time is treated as UTC at that precision.
- US Naval Observatory season times for 2026 · Updated September 19, 2026
- US Naval Observatory season times for 2027 · Updated September 19, 2026
- US Naval Observatory season times for 2028 · Updated September 19, 2026
- US Naval Observatory season times for 2029 · Updated September 19, 2026
- US Naval Observatory season times for 2030 · Updated September 19, 2026
- US Naval Observatory season times for 2031 · Updated September 19, 2026
Today and future dates
Your browser supplies today in the timezone shown. Counts update when the date changes and when you return to an open tab. Holiday dates follow their recurring rules. If we do not have a future season date, the calculator says it is unavailable instead of showing zero.
For a court deadline, payroll date or another consequential deadline, confirm the rule with the responsible organization.
Time zones and Moon phases
US Naval Observatory Moon phases
US Naval Observatory Moon phases · Updated September 19, 2026
Timezone calculations use IANA 2026d, distributed by Moment Timezone under the MIT licence. Updated September 19, 2026. Astronomy Engine by Don Cross supplies solar-time and eclipse calculations under the MIT licence. Updated September 19, 2026. Calculations are compared with the US Naval Observatory services; they are not observations.
Holiday data credits
International rule adaptations include data by the date-holidays contributors under CC BY-SA 3.0. Adaptations add English labels, jurisdiction choices and calculation rules; they remain under that licence. Download the adapted rules. UK public-sector information is used under the Open Government Licence v3.0. Canadian information follows the Open Government Licence Canada. French public information follows the Open Licence 2.0. Basado en datos de la Agencia Estatal Boletín Oficial del Estado. Each rule’s original publisher and update date are listed above.
Credits
Calendar facts are drawn from the official references above. The civil-date algorithms by Howard Hinnant are in the public domain. Archivo is designed by Omnibus-Type and used under the SIL Open Font License. Illustrations were generated for Days Until Anything.
The timezone library is the JavaScript Temporal polyfill, used under the ISC license. Its copyright and permission notice are included with the site’s software.
Calendar and observance notes
Polish working-time and day-in-lieu explanation
Working-time reduction for a public holiday other than Sunday; an employer-specific compensatory date is not a national recurring holiday. Original summary of the published rule.
Publisher’s explanation · Updated September 20, 2026.
Indigenous Peoples’ Day
Second Monday in October and local observance context. Original summary of a public calendar fact; no source prose or art reproduced.
Publisher’s explanation · Updated September 20, 2026.