Weekmark

Calendar week · ISO 8601

Week 4, 2028

Monday 24 January – Sunday 30 January 2028

  1. Mon24Jan
  2. Tue25Jan
  3. Wed26Jan
  4. Thu27Jan
  5. Fri28Jan
  6. Sat29Jan
  7. Sun30Jan
ISO week
2028-W04
Copy as
CW4 (24–30 Jan)
Quarter
Q1 2028
Weeks in 2028
52
US week number
5

Week 4 is also written KW 4 (Kalenderwoche) or CW 4. 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 24 Jan to Saturday 29 Jan a different number: week 5.