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As an international organization, W3C meetings are impacted by holidays in various countries and cultures. This page lists holidays that frequently impact our participants, so meeting planners can decide well in advance whether to reschedule or cancel meetings.

Detailed information about holidays in some jurisdictions:


1: New Year's Day. Consider overlap from "end of year" typical W3C downtime. Usually this is the remainder of the week that contains New Year's Day., with groups resuming the Monday of the first full week of the new year.

Third Monday: U.S. Martin Luther King Jr Day. A U.S. Federal holiday, often forgotten by people following their end of year break.


Third Monday: U.S. President's Day, a Federal holiday.

Chinese New Year may land end of February.


Daylight time changes may affect meetings in March

Chinese New Year may land beginning of March.

Palm Sunday, Holy Week, Good Friday and Easter Monday may occur in March.

Passover may occur in March.


29 - Golden week, Japan Daylight time changes may affect meetings in April

Palm Sunday, Holy Week, and Good Friday and Easter Monday may occur in April. In a lot of Europe these are significant holiday periods. In Australia, they may coincide with school holidays.

Passover may occur in April

April 15 is Patriots' Day in the U.S. State of Massachusetts. This localized holliday, of which even most Americans are unaware, may affect the availability of W3C staff located at MIT.


1: International Workers' Day in most of Europe, Africa, Asia, Central and Southern America.

1-5: golden week, Japan

24: Victoria Day/National Patriots' Day(Quebec) - Canada

Last Monday: U.S. Memorial Day, U.K. Spring Bank Holiday. Traditional beginning of summer in the northern hemisphere.


24: Fete nationale (a.k.a. Fete St. Jean Baptiste) - Quebec (Canada) Only


1: Canada Day, Canadian Federal holiday

4: Independence Day, U.S. Federal holiday. Often affects either the Friday following, or the Monday preceding.

14: Bastille Day, French national holiday.


2: Provincial Holidays - Canada (Each Canadian Province has a different name for this civic holiday; critically most businesses are closed)

15: Assumption (France)

Participation generally slackens for summer vacations, especially near the end of the month.


First Monday: U.S. and Canada Labor Day. Traditional end of summer holiday in the northern hemisphere.

Rosh Hashana, Yom Kippur, Sukkot, Shmini Atzeret/Simchat Torah may begin

TPAC sometimes occurs in September as in 2019 in Fukuoka, Japan


2: start of National Golden Week in China, a week-long holiday.

Rosh Hashana, Yom Kippur, Sukkot, Shmini Atzeret/Simchat Torah

Second Monday: Canadian Thanksgiving Day

Last full week of the month: Traditional week for W3C TPAC conference. In 2020 it was a virtual event spanning three weeks.

31: Halloween, not a formal holiday, but often a concern to parents with children.

Daylight time changes may affect meetings in October


11: Veteran's Day / Remembrance Day / Armistice Day in many countries.

First full week: Many W3C groups do not meet the week following TPAC, especially if they DID meet at TPAC, and especially early in the week following TPAC.

Daylight time changes may affect meetings in November.

Fourth Thursday: U.S. Thanksgiving Day, a U.S. Federal holiday. Generally also eliminates the Friday following, and the days preceding tend to be problematic.


24 and 25: Christmas Eve & Christmas Day. The 25th is a U.S. Federal holiday and days around it are frequently taken off.

26: Boxing Day, a holiday in UK and Canada.

Generally, most W3C groups suspend work for two weeks beginning the week which contains Christmas Day, continuing into the new year.