The Investiture of the Captains Regents is observed in San Marino every April 1 and October 1. This event marks the election of two Captain Regents, who serve as heads of state and government for a six-month term, ensuring a balance of political power by selecting individuals from opposing parties. The practice dates back to 1243, influenced by the customs of the Roman Republic. The investiture day is recognized as a non-working holiday, allowing citizens to celebrate this democratic tradition. Following their term, citizens have a three-day period to file complaints regarding the actions of the former Regents. San Marino operates as a multi-party democratic republic, with the right-wing Pact for San Marino and left-wing Reforms and Freedom alliances being the primary political groupings involved in the election process.