| 2024 | May 20 – May 26, 2024 |
| 2025 | May 19 – May 25, 2025 |
| 2026 | May 18 – May 24, 2026 |
| 2027 | May 24 – May 30, 2027 |
| 2028 | May 22 – May 28, 2028 |
| 2029 | May 21 – May 27, 2029 |
| 2030 | May 20 – May 26, 2030 |
| 2031 | May 19 – May 25, 2031 |
| 2032 | May 17 – May 23, 2032 |
Week 21 of 2027 runs from Monday, May 24, 2027 to Sunday, May 30, 2027.
Week 21 of 2027 starts in 306 days, on Monday, May 24, 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.