Week 31, 2026

1. Mon27Jul
2. Tue28Jul
3. Wed29Jul
4. Thu30Jul
5. Fri31Jul
6. Sat1Aug
7. Sun2Aug

ISO week

2026-W31

Copy as

CW31 (27 Jul – 2 Aug)

Quarter

Q3 2026

Weeks in 2026

53

US week number

31

Week 31 is also written KW 31 (Kalenderwoche) or CW 31. ISO weeks start on Monday, and week 1 is the week with the year’s first Thursday. US calendars start weeks on Sunday and count the week with 1 January as week 1, so they give Monday 27 Jul to Saturday 1 Aug the same number: week 31.