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Week 13 of the year

When is week 13? The exact Monday–Sunday dates of ISO week 13 for every year from 2024 to 2032.

Week 13 of 2026 runs from Monday, Mar 23, 2026 to Sunday, Mar 29, 2026 (March). Week 13 of 2026 has already passed (16 weeks ago). ISO week code: 2026-W13.

Week 13 dates by year

YearWeek 13 starts (Mon)Week 13 ends (Sun)Month
2024Monday, March 25, 2024Sunday, March 31, 2024March
2025Monday, March 24, 2025Sunday, March 30, 2025March
2026Monday, March 23, 2026Sunday, March 29, 2026March
2027Monday, March 29, 2027Sunday, April 4, 2027Mar / Apr
2028Monday, March 27, 2028Sunday, April 2, 2028Mar / Apr
2029Monday, March 26, 2029Sunday, April 1, 2029Mar / Apr
2030Monday, March 25, 2030Sunday, March 31, 2030March
2031Monday, March 24, 2031Sunday, March 30, 2031March
2032Monday, March 22, 2032Sunday, March 28, 2032March

All weeks

Frequently asked questions

What month is week 13 in?

Week 13 typically falls in Mar / Apr. The exact dates shift by up to a few days from year to year because week 1 is anchored to January 4, not January 1.

How do I write week 13 as a week code?

The ISO code is the year plus W13 — for example 2026-W13, short form 26W13, or YYWW date code 2613. See week number formats.

Are these dates the same in every country?

Yes for ISO 8601 (Monday-start) numbering, which is what this table shows. US Sunday-start calendars can label the same days with a number one higher — see week start conventions.

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