Time Zone History

Pontianak time zone history

The record holds 5 different UTC offsets, the second-most of the 11 zones on UTC+7 standard time. On standard time, clocks in Pontianak run 17 minutes behind local mean solar time.

UTC+7

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

Covers: West and central Borneo · tz database name Asia/Pontianak

Convert a time from Pontianak

Once a new standard time since 1970

UTC+7: today’s standard timeUTC+7:17:20, 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+7:17:20, UTC+7:30: ahead oftoday’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

190019201940196019001940
JanFebMarAprMayJunJulAugSepOctNovDec1970198019902000201020202028JFMAMJJASOND1970198019902000201020202028

Standard time changes

DateChangeNew standard timeClock label
Before 1970
May 1, 1908Local mean time (UTC+7:17:20) replacedUTC+7:17:20PMT
November 1, 1932Standard time forward 13 minutesUTC+7:30numeric only
January 29, 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 forward 30 minutesUTC+8WITA
Since 1970
January 1, 1988Standard time back 1 hourUTC+7WIB

Also on UTC+7

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

Clocks next door since 1970

  • Malaysia (208 km): usually 1 hour ahead; different on 6,574 days in 1970–1987.
  • Singapore (627 km): usually 1 hour ahead; different on 6,574 days in 1970–1987.
  • Jakarta (738 km): same time except 6,574 days in 1970–1987.
  • Vietnam (1,235 km): same time except 4,585 days in 1975–1987.
  • Makassar (1,253 km): usually 1 hour ahead; different on 6,574 days in 1970–1987.