Weekmark

Calendar week · ISO 8601

Week 5, 2028

Monday 31 January – Sunday 6 February 2028

  1. Mon31Jan
  2. Tue1Feb
  3. Wed2Feb
  4. Thu3Feb
  5. Fri4Feb
  6. Sat5Feb
  7. Sun6Feb
ISO week
2028-W05
Copy as
CW5 (31 Jan – 6 Feb)
Quarter
Q1 2028
Weeks in 2028
52
US week number
6

Week 5 is also written KW 5 (Kalenderwoche) or CW 5. 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 31 Jan to Saturday 5 Feb a different number: week 6.