Romania's National Day, otherwise known as Unification Day, is observed on the 1st of December annually. This significant day commemorates the assembly of the delegates of ethnic Romanians held in Alba Iulia, which voted for joining Transylvania with Romania. On this day in 1918, the unification of Transylvania, Bessarabia, and Bukovina with Romanian Kingdom took place, which is seen as an act of national self-determination.

This holiday is a nationwide public celebration filled with fervor and enthusiasm. Schools and businesses are closed as people actively participate in various events and activities. These often include military parades, concerts, cultural-educational activities, church services and traditional dances. The biggest parade takes place in Bucharest, the capital and the largest city in Romania, with thousands of troops and military technology showcasing their prowess.

National Day serves as a reminder of the country's rich history and the struggle of the Romanian people for independence, sovereignty, and unity. Evoking a sense of patriotism and national pride, it is a significant day that allows all Romanians, whether in the country or abroad, to commemorate the events that fundamentally shaped the modern day Romania. The day also has a powerful resonance in the collective memory of the Romanian people, symbolizing the unity and indivisibility of the nation.