Bayram (Turkey)

Bayram is the Turkic word for a nationally-celebrated festival or holiday, applicable to both national (i.e. secular) and religious celebrations. In accordance with this dual applicability, the method with which one determines the yearly timing of Bayrams is different for national and religious holidays.
Likely owing to the enduring Ottoman Turkish influence in the Balkans and parts of South-Eastern Europe, many non-Turkish peoples like Bosniaks, Albanian Muslims, Gorani people, Pomaks as well as Muslims from the Northern Caucasus, Azerbaijan, Crimea and other Turkic peoples, have similarly adopted the use of the word "Bayram", using the term "Lesser Bairam" to refer to their own Eid al-Fitr celebrations; "Greater Bairam" refers to Eid al Adha.
State holidays in Turkey have set dates under the nationally-used Gregorian Calendar, while the Islamic religious holidays are coordinated and publicly announced in advance by the Government's Presidency of Religious Affairs department according to the Lunar Calendar, and are subsequently accommodated into the national Gregorian Calendar, which results in the dates for religious holidays changing every year with a shift margin of approximately 11 days.
Large scale non-Turkish or non-Islamic traditions and celebrations may similarly be called Bayram, as illustrated by Halloween being referred to as "Cadılar Bayramı" (i.e. "Bayram of Witches"), Easter as "Paskalya Bayramı" (i.e. "Easter Bayram"), Christmas as "Noel Bayramı" (i.e. "Christmas Bayram"), Passover as "Hamursuz Bayramı" ("No-dough{meaning 'yeast'} Bayram"), and Hanukkah as "Yeniden Adanma Bayramı" (i.e. "Renewal/Rededication Bayram"). However, not every special occasion or holiday is referred to as a Bayram, as illustrated by the case of World Health Day, or Liberation of Istanbul, among others.
National festivals of Turkey.
Former national festival