On June 24, Chuvashia celebrates its main national holiday - Republic Day (Chuvash. Chăvash Republican kunĕ). It was officially established in 1995 in connection with the 75th anniversary of the formation of the Chuvash Autonomous Region.
The capital of the Republic is the city of Cheboksary.
On June 24, 1920, by a decree of the All-Russian Central Executive Committee and the Council of People's Commissars of the RSFSR, the Chuvash Autonomous Region was formed from the territories that were part of two provinces - Kazan and Simbirsk, with the center - the city of Cheboksary.