New Year: 1st January.
Labor Day :1st May.

Islamic holidays based on Hijri/Lunar calendar
 
Eid Al-Fiter: 3 days marking end of Ramadan (fasting month).
Eid Al-Adha: 3 days at the end of Hajj.
Islamic New Year: 1st of Moharram.
Prophet Mohammad (pbuh) Birthday: 12th Rabe'a El-Awwal.
Al-Isra' Wal Mi'raj: 27th Rajab.

Christian holidays
 
Orthodox Christmas: 7th Jan.
Armenian Christmas: 19th Jan.
Good Friday: 1 Day.
Easter Sunday: 1 Day.
Orthodox & Armenian Good Friday: 1 Day.
Orthodox & Armenian Easter Sunday: 1 Day.
Western Christmas: 25th Dec.

Jewish holidays
 
Pesach: 1st to 8th Apr.
Yum Kipur: 20th Sep.
Succoi: 25th Sep to 3rd Oct.