Calendar ATC
2025
| 24 - 28 February | Spring Holiday |
| 18 - 21 April | Good Friday and Easter |
| 27 April | King's Day |
| 28 April - 2 May | May Holiday |
| 29 & 30 May | Ascension day |
| 9 June | Whit Monday |
| 3 & 4 October | Leidens Ontzet (local holiday) |
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