In Bulgaria, the standard time is Eastern European Time (Bulgarian: Източноевропейско време; EET; UTC+02:00). Daylight saving time, which moves one hour ahead to UTC+03:00 is observed from the last Sunday in March to the last Sunday in October, inline with most EU member states.
Bulgaria first observed daylight saving time between 1943 and 1944, and regularly since 1979.
Bulgarians commonly use the 24 hour clock. The clock is used exclusively on bus and train timetables.
In the IANA time zone database, Bulgaria is given the zone Europe/Sofia:
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