Delta Glass is closed on the following dates:
| Christmas holidays | 21 Dec 2019 till 1 Jan 2020 |
| Easter Monday | 13 april 2020 |
| Kingsday | 27 April 2020 |
| Liberationday | 4 and 5 May |
| Ascension Day | 21 and 22 May 2020 |
| Pentecost Monday (Whitmonday) | 1 June 2020 |
| Summer holidays | 18 July till 9 aug 2020 |