November 30 – December 6, 2026
MonTueWedThuFriSatSun
Week 1 contains the first Thursday of the year.ISO guide →Date → week number
December 1, 2026: What week number?
Tuesday, December 1, 2026ISO Week 492026-W49
ISO Week 49 runs from November 30, 2026 to December 6, 2026.
ISO vs US-style week numbers
The same date can have different week numbers
ISO weeks start on Monday. The simplified US-style system starts on Sunday and counts the week containing January 1 as Week 1.
November 29 – December 5, 2026
SunMonTueWedThuFriSat
Week 1 contains January 1.US-style guide →ISO weekWeek 49
US-style weekWeek 49
WeekdayTuesday
QuarterQ4
Day of year335 / 365
ISO weekday2 / 7
December 2026
Date context
Tuesday, December 1, 2026 is day 335 of 2026 and belongs to ISO Week 49.
This ISO week crosses a month boundary: it starts in November and ends in December.
Distance from today
How long until December 1, 2026?
Days106
Full weeks15
Remaining days1
December 1, 2026 is 106 days from today, equal to 15 full weeks and 1 days.
International observances
Official observances on this date
World AIDS Day
International observance listed by WHO.
Official source →