Official holidays in 2025 (in addition to special leave during the annual closure):
- Wednesday, 1 January (New Year)
- Friday, 18 April (Good Friday)
- Monday, 21 April (Easter Monday)
- Thursday, 1 May (1 May)
- Thursday, 29 May (Ascension day)
- Monday, 9 June (Whit Monday)
- Thursday, 11 September ("Jeûne genevois")
- Wednesday, 24 December (Christmas Eve)
- Thursday, 25 December (Christmas)
- Wednesday, 31 December (New Year’s Eve)
Annual closure of the site of the Organization during the end-of-year holiday period:
The Laboratory will be closed from Saturday, 20 December 2025 until Sunday, 4 January 2026 inclusive (without deduction of annual leave). The first working day of the New Year will be Monday, 5 January 2026.