Week 43 of the year
When is week 43? The exact Monday–Sunday dates of ISO week 43 for every year from 2024 to 2032.
Week 43 of 2026 runs from Monday, Oct 19, 2026 to Sunday, Oct 25, 2026 (October). Week 43 of 2026 is 14 weeks away. ISO week code: 2026-W43.
Week 43 dates by year
| Year | Week 43 starts (Mon) | Week 43 ends (Sun) | Month |
|---|---|---|---|
| 2024 | Monday, October 21, 2024 | Sunday, October 27, 2024 | October |
| 2025 | Monday, October 20, 2025 | Sunday, October 26, 2025 | October |
| 2026 | Monday, October 19, 2026 | Sunday, October 25, 2026 | October |
| 2027 | Monday, October 25, 2027 | Sunday, October 31, 2027 | October |
| 2028 | Monday, October 23, 2028 | Sunday, October 29, 2028 | October |
| 2029 | Monday, October 22, 2029 | Sunday, October 28, 2029 | October |
| 2030 | Monday, October 21, 2030 | Sunday, October 27, 2030 | October |
| 2031 | Monday, October 20, 2031 | Sunday, October 26, 2031 | October |
| 2032 | Monday, October 18, 2032 | Sunday, October 24, 2032 | October |
All weeks
Frequently asked questions
What month is week 43 in?
Week 43 typically falls in October. 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 43 as a week code?
The ISO code is the year plus W43 — for example 2026-W43, short form 26W43, or YYWW date code 2643. 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.