Weekmark

Calendar week · ISO 8601

Week 19, 2026

Monday 4 May – Sunday 10 May 2026

  1. Mon4May
  2. Tue5May
  3. Wed6May
  4. Thu7May
  5. Fri8May
  6. Sat9May
  7. Sun10May
ISO week
2026-W19
Copy as
CW19 (4–10 May)
Quarter
Q2 2026
Weeks in 2026
53
US week number
19

Week 19 is also written KW 19 (Kalenderwoche) or CW 19. 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 4 May to Saturday 9 May the same number: week 19.