01/01-07/01, New Year holidays and the Epiphany (06/01)
27/02-04/03, Ash Monday (03/03)
21/03-26/03, National Holiday (25/03)
12/04-05/05 Easter Holidays and First May (20/04 + 01/05)
05/06-10/06, Holy Spirit (09/06)
01/07-14/09, Summer Holidays
24/10-31/10. National Holiday (28/10) local holiday for Thessaloniki (26/10)