1 December it is the day when all Romanians everywhere around the globe can show their patriotism.
This is a national Romanian holiday which celebrates the Great Union Day (Romanian: Ziua Marii Uniri, also called Unification Day) occurring on December 1. It commemorates the assembly of the delegates of ethnic Romanians held in Alba Iulia, which declared the Union of Transylvania with Romania.
Prior to 1918, the national holiday of Romania was set to be on May 10, which had a double meaning: it was the day on which Carol I set foot on the Romanian soil (in 1866), and it was the day on which the prince ratified the Declaration of Independence (from the Ottoman Empire) in 1877.
The traditional song for this event is the so called Round Dance of Unification (Hora Unirii).