Weekmark

Calendar week · ISO 8601

Week 3, 2025

Monday 13 January – Sunday 19 January 2025

  1. Mon13Jan
  2. Tue14Jan
  3. Wed15Jan
  4. Thu16Jan
  5. Fri17Jan
  6. Sat18Jan
  7. Sun19Jan
ISO week
2025-W03
Copy as
CW3 (13–19 Jan)
Quarter
Q1 2025
Weeks in 2025
52
US week number
3

Week 3 is also written KW 3 (Kalenderwoche) or CW 3. 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 13 Jan to Saturday 18 Jan the same number: week 3.