Weekmark

Calendar week · ISO 8601

Week 41, 2027

Monday 11 October – Sunday 17 October 2027

  1. Mon11Oct
  2. Tue12Oct
  3. Wed13Oct
  4. Thu14Oct
  5. Fri15Oct
  6. Sat16Oct
  7. Sun17Oct
ISO week
2027-W41
Copy as
CW41 (11–17 Oct)
Quarter
Q4 2027
Weeks in 2027
52
US week number
42

Week 41 is also written KW 41 (Kalenderwoche) or CW 41. 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 11 Oct to Saturday 16 Oct a different number: week 42.