| 2024 | January 1 – January 7, 2024 |
| 2025 | December 30, 2024 – January 5, 2025 |
| 2026 | December 29, 2025 – January 4, 2026 |
| 2027 | January 4 – January 10, 2027 |
| 2028 | January 3 – January 9, 2028 |
| 2029 | January 1 – January 7, 2029 |
| 2030 | December 31, 2029 – January 6, 2030 |
| 2031 | December 30, 2030 – January 5, 2031 |
| 2032 | December 29, 2031 – January 4, 2032 |
Week 1 of 2027 runs from Monday, January 4, 2027 to Sunday, January 10, 2027.
Week 1 of 2027 starts in 166 days, on Monday, January 4, 2027.
It is currently week 30 of 53 in 2026 (today is Wednesday, July 22, 2026).
These are ISO 8601 week numbers (weeks start Monday; week 1 holds the year's first Thursday), the standard in Europe and in Excel's ISOWEEKNUM. The US convention (Excel's WEEKNUM) starts week 1 on January 1 with weeks starting Sunday, so its numbers can be one higher.