Time Zone History

Thailand time zone history

The zone’s clock record is used in 5 countries and territories today. Bangkok left local mean time (UTC+6:42:04) in 1880, the second-earliest switch of the 10 zones on UTC+7 standard time with local mean time in the record.

UTC+7

Standard time is UTC+7 all year under the current rules.

tz database name Asia/Bangkok

Convert a time from Thailand

UTC+7 every day since 1970

UTC+6:42:04: 18 minutes behind today’s standard timeUTC+7: today’s standard timeUTC+6:42:04: 18 minutes behindtoday’s standard timeUTC+7: today’s standard 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+6:42:04) replacedUTC+6:42:04BMT
April 1, 1920Standard time forward 18 minutesUTC+7numeric only

Also on UTC+7

Vietnam, Pontianak (Indonesia), Jakarta (Indonesia), Hovd (Mongolia), Novokuznetsk (Russia), Barnaul (Russia), Krasnoyarsk (Russia), Novosibirsk (Russia), Tomsk (Russia) and Davis Station (Antarctica).

Clocks next door since 1970

  • Myanmar (576 km): always 30 minutes behind.
  • Vietnam (747 km): same time except 1,989 days in 1970–1975.
  • Singapore (1,434 km): usually 1 hour ahead; different on 4,383 days in 1970–1981.
  • Bangladesh (1,535 km): usually 1 hour behind; different on 195 days in 2009.
  • India (1,612 km): always 1 hour 30 minutes behind.

How it compares

Thailand has kept UTC+7 since 1920, with no clock changes since 1970.

On standard time, clocks in Bangkok run 18 minutes ahead of local mean solar time.