Week 12 of the year
When is week 12? The exact Monday–Sunday dates of ISO week 12 for every year from 2024 to 2032.
Week 12 of 2026 runs from Monday, Mar 16, 2026 to Sunday, Mar 22, 2026 (March). Week 12 of 2026 has already passed (17 weeks ago). ISO week code: 2026-W12.
Week 12 dates by year
| Year | Week 12 starts (Mon) | Week 12 ends (Sun) | Month |
|---|---|---|---|
| 2024 | Monday, March 18, 2024 | Sunday, March 24, 2024 | March |
| 2025 | Monday, March 17, 2025 | Sunday, March 23, 2025 | March |
| 2026 | Monday, March 16, 2026 | Sunday, March 22, 2026 | March |
| 2027 | Monday, March 22, 2027 | Sunday, March 28, 2027 | March |
| 2028 | Monday, March 20, 2028 | Sunday, March 26, 2028 | March |
| 2029 | Monday, March 19, 2029 | Sunday, March 25, 2029 | March |
| 2030 | Monday, March 18, 2030 | Sunday, March 24, 2030 | March |
| 2031 | Monday, March 17, 2031 | Sunday, March 23, 2031 | March |
| 2032 | Monday, March 15, 2032 | Sunday, March 21, 2032 | March |
All weeks
Frequently asked questions
What month is week 12 in?
Week 12 typically falls in March. 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 12 as a week code?
The ISO code is the year plus W12 — for example 2026-W12, short form 26W12, or YYWW date code 2612. 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.