Weekmark

Calendar week · ISO 8601

Week 20, 2027

Monday 17 May – Sunday 23 May 2027

  1. Mon17May
  2. Tue18May
  3. Wed19May
  4. Thu20May
  5. Fri21May
  6. Sat22May
  7. Sun23May
ISO week
2027-W20
Copy as
CW20 (17–23 May)
Quarter
Q2 2027
Weeks in 2027
52
US week number
21

Week 20 is also written KW 20 (Kalenderwoche) or CW 20. 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 17 May to Saturday 22 May a different number: week 21.