Time Zone History

Jakarta time zone history

Jakarta left local mean time (UTC+7:07:12) in 1867, the sixth-earliest switch of the 298 zones with local mean time in the record. The record holds 6 different UTC offsets, the most of the 11 zones on UTC+7 standard time.

UTC+7

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

Covers: Java and Sumatra · tz database name Asia/Jakarta

Convert a time from Jakarta

UTC+7 every day since 1970

UTC+7: today’s standard timeUTC+7:07:12, UTC+7:20, UTC+7:30: ahead of today’s standard timeUTC+8: 1 hour ahead of today’s standard timeUTC+9: 2 hours ahead of today’s standard timeUTC+7: today’s standard timeUTC+7:07:12, UTC+7:20, UTC+7:30:ahead of today’s standard timeUTC+8: 1 hour ahead of today’sstandard timeUTC+9: 2 hours ahead of today’sstandard time

How to read this chart

Before 1970

186018801900192019401960186019001940
JanFebMarAprMayJunJulAugSepOctNovDec1970198019902000201020202028JFMAMJJASOND1970198019902000201020202028

Standard time changes

DateChangeNew standard timeClock label
Before 1970
August 10, 1867Local mean time (UTC+7:07:12) replacedUTC+7:07:12BMT
December 31, 1923Standard time forward 13 minutesUTC+7:20numeric only
November 1, 1932Standard time forward 10 minutesUTC+7:30numeric only
March 23, 1942Standard time forward 1 hour 30 minutesUTC+9numeric only
September 23, 1945Standard time back 1 hour 30 minutesUTC+7:30numeric only
May 1, 1948Standard time forward 30 minutesUTC+8numeric only
May 1, 1950Standard time back 30 minutesUTC+7:30numeric only
January 1, 1964Standard time back 30 minutesUTC+7WIB

Also on UTC+7

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

Clocks next door since 1970

  • Pontianak (738 km): same time except 6,574 days in 1970–1987.
  • Singapore (891 km): usually 1 hour ahead; different on 4,383 days in 1970–1981.
  • Malaysia (943 km): always 1 hour ahead.
  • Makassar (1,399 km): always 1 hour ahead.
  • Vietnam (1,881 km): same time except 1,989 days in 1970–1975.

How it compares

The Jakarta zone has kept UTC+7 since 1964, with no clock changes since 1970.

On standard time, clocks in Jakarta run 7 minutes behind local mean solar time.