| 2023 | September | Monday 11 September | First day of the school year |
| October | Saturday 28 October | National holiday | |
| November | Saturday 11 November | Saint Minas day, patron saint of Heraklion | |
| Friday 17 November | Polytechnio | ||
| December | From Friday 22 December to Friday 6 January | Christmas holidays |
| 2024 | March | Monday 18 March | Clean Monday |
| Monday 25 March | National holiday | ||
| April | 1 April | Easter Monday | |
| From Saturday 27 April to Sunday 12 May | Easter holidays | ||
| May | Wednesday 1 May | Labour Day | |
| Thursday 9 May | Europe day | ||
| June | Monday 24 June | Whit Monday | |
| Wednesday 26 June | Last day of the school year |
| 2024-2025 | Public holidays / Lesson-free days | |
| Greek National Day | 28th October 2024 | |
| Saint Minas' Day (Patron Saint of Heraklion) | 11th November 2024 | |
| Anniversary of the Athens Polytechnic Uprising | 17th November 2024 | |
| Christmas Holidays | 24th December 2024 to 7th January 2025 | |
| Beginning of Lent / Ash Monday | 3rd March 2025 | |
| Greek Independence Day | 25th March 2025 | |
| Easter Holidays | 14th April 2025 to 25th April 2025 | |
| Labour Day | 1st May 2025 | |
| Holy Spirit Day | 9th June 2025 | |