Weekmark

Calendar week · ISO 8601

Week 18, 2027

Monday 3 May – Sunday 9 May 2027

  1. Mon3May
  2. Tue4May
  3. Wed5May
  4. Thu6May
  5. Fri7May
  6. Sat8May
  7. Sun9May
ISO week
2027-W18
Copy as
CW18 (3–9 May)
Quarter
Q2 2027
Weeks in 2027
52
US week number
19

Week 18 is also written KW 18 (Kalenderwoche) or CW 18. 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 3 May to Saturday 8 May a different number: week 19.