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Malaysian Standard Time
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Wikipedia
Malaysian Standard Time (MST; Malay: Waktu Piawai Malaysia) is a standard time used in Malaysia. It is 8 hours ahead of Greenwich Mean Time and Coordinated Universal Time. The local mean time in Kuala Lumpur was originally +6:46:48 GMT. Peninsular Malaysia used this local mean time until 1880, when they changed to Singapore mean time +6:55:24 GMT. Between the end of the Second World War and the formation of Malaysia in 1963, it was known as British Malayan Standard Time, which was 30 ahead of Greenwich Mean Time. At 23:30 hrs local time of December 31, 1981, people in Peninsular Malaysia adjusted their clocks and watches ahead by 30 minutes to match the time in use in East Malaysia, which was 00:00 hrs of January 1, 1982.

Time changing chronicles (Peninsular Malaysia)

Period in use Time offset from GMT Name of Time (unofficial)
Until May 31, 1905 + 6hr 46m 48s British Malayan Mean Time
June 1, 1905 - December 31, 1932 + 7hr 00m 00s Standard Zone Time
January 1, 1933 - August 31, 1941 + 7hr 20m 00s Daylight saving time
September 1, 1941 - February 15, 1942 + 7hr 30m 00s Daylight saving time
February 16, 1942 - September 12, 1945 + 9hr 00m 00s Tokyo Standard Time
September 13, 1945 - December 31, 1981 + 7hr 30m 00s Daylight saving time/Malaysian Standard Time
January 1, 1982 - Present + 8hr 00m 00s Malaysian Standard Time

Time in East Malaysia

The local mean time in Kuching is +7:21:20 GMT. Sabah and Sarawak used local mean time until 1926. They then changed to +7:30 GMT. In 1933, when West Malaysia changed to +7:20 GMT, they changed to +8:00 GMT, with a 20-minute time change between September 14 and December 14. During the Japanese occupation, Tokyo time (+9:00 GMT) was used, before changing back to +8:00 GMT, but without the daylight saving time, in 1945.

   Zone Asia/Kuching
   7:21:20 -       LMT     1926 Mar
   7:30    -       BORT    1933    # Borneo Time
   8:00    NBorneo BOR%sT  1942
   9:00    -       JST     1945 Sep 2
   8:00    -       BORT    1982 May
   8:00    -       MYT

   # Rule  NAME     FROM  TO    ON      AT    SAVE LETTER/S
   Rule    NBorneo  1935  1941  Sep 14  0:00  0:20 TS
   Rule    NBorneo  1935  1941  Dec 14  0:00  0    -

The daylight saving time from September 14 to December 14 is very interesting. On November 3, the equation of time reaches a maximum of 16m 25s. This seems to be an attempt at reducing the variation in the time of the sunrise by looking at how the analemma rises in the tropics.

History

Standardisation of time in Malaysia

Malaysia declared that people in West Malaysia would move their clocks ahead by 30 min to match the time in use in East Malaysia (8 hrs ahead of GMT) in 1981. However many find this to be awkward as most of Malaysians (roughly 80%) live in West Malaysia rather than in East Malaysia. Malaysia is currently in effect running on the equivalent of the usual 'Spring Forward, Autumn Back' type of daylight saving time found in North America and Europe. Such 'normal' DST is usually Standard Zone Time + 1 hour. Malaysia's mathematical Standard Zone Time is +7:00 GMT, hence the current +8:00 GMT is = 7 + 1 which is equivalent to the DST during the summer months in the temperate countries.

Official site

Monitor

Malaysian Standard Time is monitored by SIRIM.

References

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