 In February 1963, during the abortive administrative reform by Nikita Khrushchev, Firovsky District was merged into Vyshnevolotsky District, but on April 6, 1972 it was re-established.In 1990, Kalinin Oblast was renamed Tver Oblast.Another district established on July 12, 1929 was Yesenovichsky District with the administrative center in the selo of Yesenovichi.