Until a reform on 28 March 2010, Samara Time was
UTC+4 in winter and Samara Summer Time (SAMST) was
UTC+5 in summer. From that date, Samara Time was abolished with the two regions effectively joining
Moscow Summer Time. In March 2011, Moscow time was moved forward to
UTC+04:00 year-round, and Samara Time was reinstated on 26 October 2014, when Moscow time moved back one hour to
UTC+03:00 year-round and Samara Oblast and Udmurtia remained on
UTC+04:00. On 27 March 2016,
Ulyanovsk Oblast and
Astrakhan Oblast switched to Samara Time by moving the clock 1 hour forwards from Moscow time. On 4 December 2016,
Saratov Oblast also switched to Samara Time by moving forward 1 hour from Moscow time. On 28 October 2018,
Volgograd Oblast also switched to Samara Time by moving forward 1 hour from Moscow time, but this change was reverted on 27 December 2020. == IANA time zone database ==