Week 3 2026: Jan 12 – Jan 18
When is week 3? The exact Monday–Sunday dates of ISO week 3 for every year from 2024 to 2032.
Week 3 of 2026 runs from Monday, Jan 12, 2026 to Sunday, Jan 18, 2026 (January). In 2027, week 3 runs from Monday, Jan 18, 2027 to Sunday, Jan 24, 2027. ISO week code: 2026-W03.
The seven days of week 3
| Date | ISO week date | Day of year | Holidays |
|---|---|---|---|
| Monday, January 12, 2026 | 2026-W03-1 | 12 | — |
| Tuesday, January 13, 2026 | 2026-W03-2 | 13 | — |
| Wednesday, January 14, 2026 | 2026-W03-3 | 14 | — |
| Thursday, January 15, 2026 | 2026-W03-4 | 15 | — |
| Friday, January 16, 2026 | 2026-W03-5 | 16 | — |
| Saturday, January 17, 2026 | 2026-W03-6 | 17 | — |
| Sunday, January 18, 2026 | 2026-W03-7 | 18 | — |
Day-of-year numbers and common US and international holidays. Weekday digits in the ISO week date run 1 (Monday) to 7 (Sunday).
Week 3 dates by year
| Year | Week 3 starts (Mon) | Week 3 ends (Sun) | Month |
|---|---|---|---|
| 2024 | Monday, January 15, 2024 | Sunday, January 21, 2024 | January |
| 2025 | Monday, January 13, 2025 | Sunday, January 19, 2025 | January |
| 2026 | Monday, January 12, 2026 | Sunday, January 18, 2026 | January |
| 2027 | Monday, January 18, 2027 | Sunday, January 24, 2027 | January |
| 2028 | Monday, January 17, 2028 | Sunday, January 23, 2028 | January |
| 2029 | Monday, January 15, 2029 | Sunday, January 21, 2029 | January |
| 2030 | Monday, January 14, 2030 | Sunday, January 20, 2030 | January |
| 2031 | Monday, January 13, 2031 | Sunday, January 19, 2031 | January |
| 2032 | Monday, January 12, 2032 | Sunday, January 18, 2032 | January |
All weeks
Frequently asked questions
What month is week 3 in?
Week 3 typically falls in January. 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 3 as a week code?
The ISO code is the year plus W03 — for example 2026-W03, short form 26W03, or YYWW date code 2603. 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.