Weekmark

Calendar week · ISO 8601

Week 13, 2027

Monday 29 March – Sunday 4 April 2027

  1. Mon29Mar
  2. Tue30Mar
  3. Wed31Mar
  4. Thu1Apr
  5. Fri2Apr
  6. Sat3Apr
  7. Sun4Apr
ISO week
2027-W13
Copy as
CW13 (29 Mar – 4 Apr)
Quarter
Q2 2027
Weeks in 2027
52
US week number
14

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 29 Mar to Saturday 3 Apr a different number: week 14.