Weekmark

Calendar week · ISO 8601

Week 5, 2025

Monday 27 January – Sunday 2 February 2025

  1. Mon27Jan
  2. Tue28Jan
  3. Wed29Jan
  4. Thu30Jan
  5. Fri31Jan
  6. Sat1Feb
  7. Sun2Feb
ISO week
2025-W05
Copy as
CW5 (27 Jan – 2 Feb)
Quarter
Q1 2025
Weeks in 2025
52
US week number
5

Week 5 is also written KW 5 (Kalenderwoche) or CW 5. 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 Jan to Saturday 1 Feb the same number: week 5.