Delta Glass is closed on the following dates:
| Christmas holidays 2018-2019 | 22 Dec 2018 till 1 Jan 2019 |
| Easter Monday | 22 april 2019 |
| Kingsday | 27 April 2019 |
| Ascension Day | 30 and 31 May 2019 |
| Pentecost Monday (Whitmonday) | 10 June 2018 |
| Summer holidays | 22 July till 9 aug 2018 |
| Christmas holidays 2018-2019 | 23 Dec 2019 till 1 Jan 2020 |