Date → week number

March 1, 2026: What week number?

Sunday, March 1, 2026ISO Week 92026-W09

ISO Week 9 runs from February 23, 2026 to March 1, 2026.

Mon23FebruaryTue24FebruaryWed25FebruaryThu26FebruaryFri27FebruarySat28FebruarySun1March
← 02-28-202603-02-2026 →

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.

ISO week2026-W09

February 23 – March 1, 2026

MonTueWedThuFriSatSun
Week 1 contains the first Thursday of the year.ISO guide →
US-style weekWeek 10

March 1–7, 2026

SunMonTueWedThuFriSat
Week 1 contains January 1.US-style guide →
ISO weekWeek 9
US-style weekWeek 10
WeekdaySunday
QuarterQ1
Day of year60 / 365
ISO weekday7 / 7

Date context

Sunday, March 1, 2026 is day 60 of 2026 and belongs to ISO Week 9.

This ISO week crosses a month boundary: it starts in February and ends in March.

Distance from today

How long ago was March 1, 2026?

Days169
Full weeks24
Remaining days1

March 1, 2026 is 169 days before today, equal to 24 full weeks and 1 days.