Working days of the Euratom Supply Agency are any days other than Saturdays, Sundays or public holidays for European Union staff in Luxembourg.
Below are listed public holidays for European Union staff in Luxembourg, adopted pursuant to Article 61 of the Staff Regulations of Officials of the European Union and Articles 16 and 91 of the Conditions of Employment of Other Servants of the European Union (CEOS), laid down by Council Regulation (EEC, Euratom, ECSC) No 259/68.
Public holidays 2028
| 13 April | Maundy Thursday |
| 14 April | Good Friday |
| 17 April | Easter Monday |
| 1 May | Labour Day |
| 9 May | Anniversary of the Declaration by Robert Schuman in 1950 |
| 25 May | Ascension Day |
| 26 May | Day after Ascension Day |
| 5 June | Whit Monday |
| 23 June* | Luxembourg National Holiday *for staff serving in Luxembourg |
| 21 July* | Belgian National Holiday *for staff serving in Brussels |
| 15 August | Assumption |
| 1 November | All Saints’ Day |
| 2 November | All Souls’ Day |
| 25 December to 29 December | 5 end-of-year days |
Public holidays 2027
| 1 January | New Year's Day |
| 25 March | Maundy Thursday |
| 26 March | Good Friday |
| 29 March | Easter Monday |
| 6 May | Ascension Day |
| 7 May | Day after Ascension Day |
| 17 May | Whit Monday |
| 23 June | Luxembourg National Holiday |
| 1 November | All Saints' Day |
| 2 November | All Soul's Day |
| 23 December to 31 December | 7 end-of-year days |
Public holidays 2026
| 1 January | New Year's Day |
| 2 January | Day after New Year’s Day |
| 2 April | Maundy Thursday |
| 3 April | Good Friday |
| 6 April | Easter Monday |
| 1 May | Labour Day |
| 14 May | Ascension Day |
| 15 May | Day after Ascension Day |
| 25 May | Whit Monday |
| 23 June | Luxembourg National Holiday |
| 2 November | All Soul's Day |
| 24 December to 31 December | 6 end-of-year days |