Legal public holidays based on the Iranian solar calendar include the cultural celebrations of Nowruz (Farvardin 1–4; 21–24 March) and Sizdebedar (Farvardin 13; 2April), and the political events of Islamic Republic Day (Farvardin 12; 1April), the death of Ruhollah Khomeini (Khordad 14; 4June), the Khordad 15 event (Khordad 15; 5June), the anniversary of the 1979 Revolution (Bahman 22; 10 February), and Oil Nationalization Day (Esfand 29; 19 March).