Date → week number

November 4, 2000: What week number?

Saturday, November 4, 2000ISO Week 442000-W44

ISO Week 44 runs from October 30, 2000 to November 5, 2000.

Mon30OctoberTue31OctoberWed1NovemberThu2NovemberFri3NovemberSat4NovemberSun5November
← 11-03-200011-05-2000 →

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.

ISO week2000-W44

October 30 – November 5, 2000

MonTueWedThuFriSatSun
Week 1 contains the first Thursday of the year.ISO guide →
US-style weekWeek 45

October 29 – November 4, 2000

SunMonTueWedThuFriSat
Week 1 contains January 1.US-style guide →
ISO weekWeek 44
US-style weekWeek 45
WeekdaySaturday
QuarterQ4
Day of year309 / 366
ISO weekday6 / 7

Date context

Saturday, November 4, 2000 is day 309 of 2000 and belongs to ISO Week 44.

This ISO week crosses a month boundary: it starts in October and ends in November.

Distance from today

How long ago was November 4, 2000?

Days9417
Full weeks1345
Remaining days2

November 4, 2000 is 9417 days before today, equal to 1345 full weeks and 2 days.