Weekmark

Calendar week · ISO 8601

Week 3, 2027

Monday 18 January – Sunday 24 January 2027

  1. Mon18Jan
  2. Tue19Jan
  3. Wed20Jan
  4. Thu21Jan
  5. Fri22Jan
  6. Sat23Jan
  7. Sun24Jan
ISO week
2027-W03
Copy as
CW3 (18–24 Jan)
Quarter
Q1 2027
Weeks in 2027
52
US week number
4

Week 3 is also written KW 3 (Kalenderwoche) or CW 3. 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 Jan to Saturday 23 Jan a different number: week 4.