Weekmark

Calendar week · ISO 8601

Week 12, 2027

Monday 22 March – Sunday 28 March 2027

  1. Mon22Mar
  2. Tue23Mar
  3. Wed24Mar
  4. Thu25Mar
  5. Fri26Mar
  6. Sat27Mar
  7. Sun28Mar
ISO week
2027-W12
Copy as
CW12 (22–28 Mar)
Quarter
Q1 2027
Weeks in 2027
52
US week number
13

Week 12 is also written KW 12 (Kalenderwoche) or CW 12. 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 22 Mar to Saturday 27 Mar a different number: week 13.