Calendar ATC
2024
| 19 - 23 February | Spring Holiday |
| 29 March - 1 April | Good Friday and Easter |
| 27 April | King's Day |
| 29 April - 3 May | May Holiday |
| 9 & 10 May | Ascension day |
| 20 May | Whit Monday |
| 3 & 4 October | Leidens Ontzet (local holiday) |
| 28 Oct - 1 Nov | Autumn Holiday |
| 23 Dec - 3 Jan | Christmas/New Year |