Odd Thursday in 2021, Ireland
| week 1 | 7 January 2021 |
| week 3 | 21 January 2021 |
| week 5 | 4 February 2021 |
| week 7 | 18 February 2021 |
| week 9 | 4 March 2021 |
| week 11 | 18 March 2021 |
| week 13 | 1 April 2021 |
| week 15 | 15 April 2021 |
| week 17 | 29 April 2021 |
| week 19 | 13 May 2021 |
| week 21 | 27 May 2021 |
| week 23 | 10 June 2021 |
| week 25 | 24 June 2021 |
| week 27 | 8 July 2021 |
| week 29 | 22 July 2021 |
| week 31 | 5 August 2021 |
| week 33 | 19 August 2021 |
| week 35 | 2 September 2021 |
| week 37 | 16 September 2021 |
| week 39 | 30 September 2021 |
| week 41 | 14 October 2021 |
| week 43 | 28 October 2021 |
| week 45 | 11 November 2021 |
| week 47 | 25 November 2021 |
| week 49 | 9 December 2021 |
| week 51 | 23 December 2021 |
Even: even Monday 2021, even Tuesday 2021, even Wednesday 2021, even Thursday 2021, even Friday 2021, even Saturday 2021, even Sunday 2021
Odd: odd Monday 2021, odd Tuesday 2021, odd Wednesday 2021, odd Thursday 2021, odd Friday 2021, odd Saturday 2021, odd Sunday 2021