Date → week number

January 26, 2026: What week number?

Monday, January 26, 2026ISO Week 52026-W05

ISO Week 5 runs from January 26, 2026 to February 1, 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-W05

January 26 – February 1, 2026

MonTueWedThuFriSatSun

Week 1 contains the first Thursday of the year.ISO guide →

US-style weekWeek 5

January 25–31, 2026

SunMonTueWedThuFriSat

Week 1 contains January 1.US-style guide →

ISO weekWeek 5

US-style weekWeek 5

WeekdayMonday

QuarterQ1

Day of year26 / 365

ISO weekday1 / 7

WkMonTueWedThuFriSatSun

Monday, January 26, 2026 is day 26 of 2026 and belongs to ISO Week 5.

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

Distance from today

Days203

Full weeks29

Remaining days0

January 26, 2026 is 203 days before today, equal to 29 full weeks.

International observances

International observance listed by UN.