Weekmark

Calendar week · ISO 8601

Week 13, 2025

Monday 24 March – Sunday 30 March 2025

  1. Mon24Mar
  2. Tue25Mar
  3. Wed26Mar
  4. Thu27Mar
  5. Fri28Mar
  6. Sat29Mar
  7. Sun30Mar
ISO week
2025-W13
Copy as
CW13 (24–30 Mar)
Quarter
Q1 2025
Weeks in 2025
52
US week number
13

Week 13 is also written KW 13 (Kalenderwoche) or CW 13. 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 24 Mar to Saturday 29 Mar the same number: week 13.