Singapore Standard Time

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Singapore Standard Time (SST) or Waktu Piawai Singapura (WPS), also known as Singapore Time (SGT), is used in Singapore and is 8 hours ahead of UTC (UTC+08:00).


As part of British Malaya, Singapore originally adopted the Malayan time, which was 7 hours 30 minutes ahead of GMT.

Following the Japanese occupation, Malaya adopted Tokyo time of GMT+9 on 15 February 1942. Although official appointments were made according to Tokyo time it was common practice to keep two separate times: the pre-Occupation time at home and Tokyo time on personal watches.

At the end of World War II and the return of Malaya to the British, Singapore reverted to its pre-war timezone.

Daylight saving time in Singapore[edit]

Although Singapore does not currently observe daylight saving time in the traditional sense due to its tropical location, a form of daylight saving time, using a 20-minute offset, was introduced on an annual basis by the Legislative Council of the Straits Settlements in 1933, after an earlier attempt was abandoned in 1920. This offset was formally adopted as standard time in Singapore in 1936, and in 1941 the offset was increased to 30 minutes, the same as the 1920 proposal.

Malaysian standardisation[edit]

In 1981, Malaysia decided to standardize the time across its territories to a uniform UTC+08:00. Singapore elected to follow suit, citing business and travel schedules. The change took effect on 1 January 1982, when Singapore moved half an hour forward, creating "Singapore Standard Time" (SST).[1] SST is eight hours ahead of UTC and is synchronized with Hong Kong, Taipei, Beijing, Manila and Perth.

Period in use[2] Time offset from UTC
(GMT prior to 1972-01-01)
Reference Meridian
Prior to 1 June 1905 UTC+6hr 55m 25s 103° 51' 16" E
1 June 1905 – 31 December 1932 UTC+07:00 105° 00' 00" E
1 January 1933 – 31 August 1941 UTC+07:20 110° 00' 00" E
1 September 1941 – 15 February 1942 UTC+07:30 112° 30' 00" E
15 February 1942 – 11 September 1945 UTC+09:00 135° 00' 00" E
12 September 1945 – 31 December 1981 UTC+07:30 112° 30' 00" E
1 January 1982 – present UTC+08:00 120° 00' 00" E


The Time & Frequency Laboratory of National Metrology Centre (NMC) establishes, maintains and disseminates the national time scale of Singapore, which is the Coordinated Universal Time of Singapore, UTC (SG) and Singapore Standard Time (SST). NMC aligns SST to the international time scale, the UTC, through regular time comparisons by Global Positioning System (GPS) All-In-View technique under a global network of about forty national time standard laboratories.[3]

IANA time zone database[edit]

The IANA time zone database contains one zone for Singapore in the file

C.C.* Coordinates* TZ* Comment Format UTC offset UTC offset DST Notes
SG +0117+10351 Asia/Singapore Canonical +08:00 +08:00

See also[edit]


  1. ^ "Press Release on Time Zone Adjustment" (PDF). National Archives of Singapore. 20 December 1981. 
  2. ^ "Why is Singapore in the "Wrong" Time Zone?". 28 June 2012. 
  3. ^ "National Time Scale of Singapore and Time-Dissemination". 

External links[edit]