Weekmark

Calendar week · ISO 8601

Week 51, 2028

Monday 18 December – Sunday 24 December 2028

  1. Mon18Dec
  2. Tue19Dec
  3. Wed20Dec
  4. Thu21Dec
  5. Fri22Dec
  6. Sat23Dec
  7. Sun24Dec
ISO week
2028-W51
Copy as
CW51 (18–24 Dec)
Quarter
Q4 2028
Weeks in 2028
52
US week number
52

Week 51 is also written KW 51 (Kalenderwoche) or CW 51. 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 18 Dec to Saturday 23 Dec a different number: week 52.