| 2025-2026 | National holidays / Lesson-free days | |
| First day of school | September 11, 2025 | |
| Greek National Day - "OXI" Day | October 28, 2025 | |
| Saint Minas' Day (Patron Saint of Heraklion) | November 11, 2025 | |
| Anniversary of the Athens Polytechnic Uprising | November 17, 2025 | |
| Christmas Holidays | December 24, 2025, to January 7, 2026 | |
| Beginning of Lent / Ash Monday | February 23, 2026 | |
| Greek National Day - Independence Day | March 25, 2026 | |
| Easter Holidays | April 6, 2026, to April 19, 2026 | |
| Labour Day | May 1, 2026 | |
| Holy Spirit Day | June 1, 2026 | |