Time Zone History

Georgia time zone history

On standard time, clocks at Tbilisi run 1 hour 1 minute ahead of local mean solar time, the second-largest gap of the 9 zones on UTC+4 standard time. Tbilisi left local mean time (UTC+2:59:11) in 1880, the earliest switch of the 9 zones on UTC+4 standard time. Daylight saving time was used in 24 years since 1970, last in 2004; under the current rules the clocks no longer change.

UTC+4

Standard time is UTC+4 all year under the current rules.

tz database name Asia/Tbilisi

Convert a time from Georgia

Summer time in 24 of 57 years since 1970

UTC+2:59:11, UTC+3: behind today’s standard timeUTC+4: today’s standard timeUTC+5: 1 hour ahead of today’s standard timeUTC+2:59:11, UTC+3: behind today’sstandard timeUTC+4: today’s standard timeUTC+5: 1 hour ahead of today’sstandard time

How to read this chart

Before 1970

187018901910193019501970187019101950
JanFebMarAprMayJunJulAugSepOctNovDec1970198019902000201020202028JFMAMJJASOND1970198019902000201020202028

Standard time changes

DateChangeNew standard timeClock label
Before 1970
January 1, 1880Local mean time (UTC+2:59:11) replacedUTC+2:59:11TBMT
May 2, 1924Standard time forward 1 minuteUTC+3numeric only
March 1, 1957Standard time forward 1 hourUTC+4numeric only
Since 1970
March 31, 1991Summer offset kept as standard time; clocks did not moveUTC+3numeric only
September 25, 1994Summer offset kept as standard time; clocks did not moveUTC+4numeric only
June 27, 2004Standard time back 1 hourUTC+3numeric only
March 27, 2005Standard time forward 1 hourUTC+4numeric only

Daylight saving periods

YearsClocks go forwardClocks go backShift and labels
1981–19831 April, 00:001 October, 00:001 hour
1984April 1September 301 hour
1985–1990last Sunday in March, 02:00last Sunday in September, 03:001 hour
1991not that yearSeptember 291 hour
1992–1993last Sunday in March, 00:00fourth Sunday in September, 00:001 hour
1994March 27not that year1 hour
1995March 26September 241 hour
1996March 31not that year1 hour
1997not that yearOctober 261 hour
1998–2004last Sunday in March, 00:00last Sunday in October, 00:001 hour

Also on UTC+4

Armenia, Azerbaijan, Astrakhan (Russia), Saratov (Russia), Samara (Russia), Ulyanovsk (Russia), United Arab Emirates and Mauritius.

Clocks next door since 1970

  • Armenia (173 km): same time except 2,508 days in 1992–2011.
  • Azerbaijan (447 km): same time except 3,328 days in 1992–2015.
  • Aqtau (Kazakhstan) (541 km): usually 1 hour ahead; different on 5,055 days in 1981–2005.
  • Astrakhan (Russia) (576 km): same time except 5,900 days in 1989–2011 and 2014–2016.
  • Volgograd (Russia) (781 km): same time except 9,405 days in 1988–2011, 2014–2018 and 2020–2026; 1 hour behind today.