Investiture of the Captains Regent - Spring in Citta di San Marino
The spring Investiture of the Captains Regent takes place every first of April in Citta di San Marino, when the republic's two joint heads of state are sworn in for their six-month term through a full day of flag ceremonies, a High Mass and a formal procession, all free and open to visitors.
Twice a year, on the first of April and the first of October, San Marino performs one of Europe's oldest continuously enacted transfers of political power, and it does so entirely in public.