Public holidays
Public holidays in 2021
| Friday 1 January | New Year's Day |
| Friday 2 April | in substitution for Saturday 1 May (Labour Day) |
| Monday 5 April | Easter Monday |
| Thursday 13 May | Ascension Day |
| Friday 14 May | in substitution for Sunday 15 August (Assumption of the Holy Virgin) |
| Monday 24 May | Whit Monday |
| Wednesday 21 July | National Holiday |
| Monday 1 November | All Saints' Day |
| Thursday 11 November | Armistice Day |
Specific closing days
Some NBB services or applications follow a specific calendar: