Odd and even weeks in 2021
2021 has 52 weeks: 26 even and 26 odd. Week numbers follow ISO 8601 (Monday to Sunday).
| Wk | Start date | End date | Type |
|---|---|---|---|
| Wk 1 | Jan 4 | Jan 10 | odd week |
| Wk 2 | Jan 11 | Jan 17 | even week |
| Wk 3 | Jan 18 | Jan 24 | odd week |
| Wk 4 | Jan 25 | Jan 31 | even week |
| Wk 5 | Feb 1 | Feb 7 | odd week |
| Wk 6 | Feb 8 | Feb 14 | even week |
| Wk 7 | Feb 15 | Feb 21 | odd week |
| Wk 8 | Feb 22 | Feb 28 | even week |
| Wk 9 | Mar 1 | Mar 7 | odd week |
| Wk 10 | Mar 8 | Mar 14 | even week |
| Wk 11 | Mar 15 | Mar 21 | odd week |
| Wk 12 | Mar 22 | Mar 28 | even week |
| Wk 13 | Mar 29 | Apr 4 | odd week |
| Wk 14 | Apr 5 | Apr 11 | even week |
| Wk 15 | Apr 12 | Apr 18 | odd week |
| Wk 16 | Apr 19 | Apr 25 | even week |
| Wk 17 | Apr 26 | May 2 | odd week |
| Wk 18 | May 3 | May 9 | even week |
| Wk 19 | May 10 | May 16 | odd week |
| Wk 20 | May 17 | May 23 | even week |
| Wk 21 | May 24 | May 30 | odd week |
| Wk 22 | May 31 | Jun 6 | even week |
| Wk 23 | Jun 7 | Jun 13 | odd week |
| Wk 24 | Jun 14 | Jun 20 | even week |
| Wk 25 | Jun 21 | Jun 27 | odd week |
| Wk 26 | Jun 28 | Jul 4 | even week |
| Wk 27 | Jul 5 | Jul 11 | odd week |
| Wk 28 | Jul 12 | Jul 18 | even week |
| Wk 29 | Jul 19 | Jul 25 | odd week |
| Wk 30 | Jul 26 | Aug 1 | even week |
| Wk 31 | Aug 2 | Aug 8 | odd week |
| Wk 32 | Aug 9 | Aug 15 | even week |
| Wk 33 | Aug 16 | Aug 22 | odd week |
| Wk 34 | Aug 23 | Aug 29 | even week |
| Wk 35 | Aug 30 | Sep 5 | odd week |
| Wk 36 | Sep 6 | Sep 12 | even week |
| Wk 37 | Sep 13 | Sep 19 | odd week |
| Wk 38 | Sep 20 | Sep 26 | even week |
| Wk 39 | Sep 27 | Oct 3 | odd week |
| Wk 40 | Oct 4 | Oct 10 | even week |
| Wk 41 | Oct 11 | Oct 17 | odd week |
| Wk 42 | Oct 18 | Oct 24 | even week |
| Wk 43 | Oct 25 | Oct 31 | odd week |
| Wk 44 | Nov 1 | Nov 7 | even week |
| Wk 45 | Nov 8 | Nov 14 | odd week |
| Wk 46 | Nov 15 | Nov 21 | even week |
| Wk 47 | Nov 22 | Nov 28 | odd week |
| Wk 48 | Nov 29 | Dec 5 | even week |
| Wk 49 | Dec 6 | Dec 12 | odd week |
| Wk 50 | Dec 13 | Dec 19 | even week |
| Wk 51 | Dec 20 | Dec 26 | odd week |
| Wk 52 | Dec 27 | Jan 2 | even week |