Great Union Day is a national holiday in Romania, celebrated on 1 December, marking the unification of Transylvania, Bassarabia, and Bukovina with the Romanian Kingdom in 1918, something that is known as the Great Union. This holiday was declared after the Romanian Revolution and commemorates the Great National Assembly of the delegates of ethnic Romanians held in Alba Iulia, who declared the Union of Transylvania with Romania.

The following is a list of public holidays in Romania. According to Romanian law, Romania had 51 public holidays as of 2011, which cover 14% of the days of the year in the country.