with official ceremonies conducted by the heads of state and the holy masses of the Lithuanian Catholic Church in the Vilnius Cathedral. While in the evening of 12 January bonfires are ignited to mark the bloody January Events. Saint Casimir's Fair () has been held annually for hundreds of years in the city's markets and streets on the Sunday nearest to 4 March (Feast of St. Casimir), the anniversary of Saint Casimir's death. It attracts tens of thousands of visitors and many Lithuanian and foreign craftsmen. Easter palms () are one of the most recognizable symbols of the fair. Capital's Days () is the biggest festival of music and culture held in the city annually for three days (from 30 August to 1 September). Although it is not a national holiday, the Vilnia River is dyed green every year for Saint Patrick's Day. During the annual Vilnius Culture Night various artists and cultural organisations hold events and performances all over the city. Administration City government Before the Magdeburg rights were granted to Vilnius in 1378, the city was overseen by the ruler's vicegerents. Later these duties were granted to a magistrate or a City Council, subordinate only to the ruler himself. During wars, when the city was in a danger, the city was led by a Voivode of Vilnius. The magisterial authority was headquartered at the Vilnius Town Hall. Vilnius Magistrate was responsible for the city economy, was collecting taxes, taking care of the city treasury, was accumulating stocks of grain in order to avoid residents starvation in case of famine or wars. He also acted as a notary in transactions, testaments and as a judge during the city residents conflicts that involved new buildings constructions and reconstructions. His other function was taking care of the city craftsmen. From the beginning, statutes of workshops were approved by the ruler himself. Later, Sigismund II Augustus granted this privilege to the city magistrates in 1552. Since the 1522 privilege by Sigismund I the Old, Vilnius Magistrates had the responsibility to protect the city and its resident's tranquility by having 24 armed guards. During war times, the night watch was performed by three jurisdictions – magistrate, bishop and castle men. Chief City Administrator was vaitas (a Grand Duke of Lithuania vicegerent in the city). Most of them were beginning their careers in the magistracy before obtaining such a position. All vaitai were Catholics.