Singapore Standard Time

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Singapore Standard Time
World Time Zones Map.png
UTC offset
SSTUTC+08:00
Current time
21:48, 19 May 2019 SST [refresh]
Observance of DST
DST is not observed in this time zone.

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). Singapore does not currently observe daylight saving time.[1]

History[edit]

As part of British Malaya, Singapore originally adopted the Malayan time, which was UTC+07:30 in 1941.

Following the Japanese occupation, Malaya adopted Tokyo time of UTC+09:00 on 15 February 1942.[2] 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.

Newspaper clipping from 27 September 1932 on Daylight Saving Bill

Daylight saving time in Singapore[edit]

Newspaper clipping from 31 December 1932 on putting the clock forward 20 minutes

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.

In 1932, Sir Arnold Robinson[3][4] raised the idea of 20-minute offset after an earlier attempt was abandoned in 1920 which was first proposed by Sir Laurence Guillemard for a 30-minute offset.[5] The 20-minute offset was formally adopted as standard time in Singapore in 1936,[5] and in 1 September 1941 the offset was increased to 30 minutes,[6] 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.[7][8] The change took effect on 1 January 1982, when Singapore moved half an hour forward, on 31 December 1981 at 11:30 pm, creating "Singapore Standard Time" (SST).[9] SST is 8 hours ahead of UTC and is synchronized with Shanghai, Beijing, Hong Kong, Taipei, Perth and Manila.

History of Singapore Standard Time[edit]

Period in use[10] Time offset from UTC
(GMT prior to 1 January 1972)
Reference Meridian Notes
Prior to 1 June 1905 UTC+06:55:25 103° 51' 16" E [11]
1 June 1905 – 31 December 1932 UTC+07:00 105° 00' 00" E [12]
1 January 1933 – 31 August 1941 UTC+07:20 110° 00' 00" E [5]
1 September 1941 – 15 February 1942 UTC+07:30 112° 30' 00" E [6]
16 February 1942 – 11 September 1945 UTC+09:00 135° 00' 00" E [2]
12 September 1945 – 31 December 1981 UTC+07:30 112° 30' 00" E
1 January 1982 – present UTC+08:00 120° 00' 00" E [7] [8] [9]

Timekeeper[edit]

The Time & Frequency Laboratory of A*STAR's 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.[13]

IANA time zone database[edit]

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

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]

References[edit]

  1. ^ "Current Local Time in Singapore". timeanddate.com.
  2. ^ a b "Malaya Finish With "Tokyo Time"". The Straits Times. 7 September 1945. p. 1. Retrieved 5 September 2018.
  3. ^ "Who is Sir Arnold Robinson". The Singapore Free Press and Mercantile Advertiser. 5 August 1935. p. 6. Retrieved 5 September 2018.
  4. ^ "Sir Arnold Robinson". The Straits Times. 4 August 1935. p. 13.
  5. ^ a b c "Twenty Minutes". Malaya Tribune. 4 January 1937. p. 10. Retrieved 5 September 2018.
  6. ^ a b "All Clocks Advanced Ten Minutes". The Straits Times. 1 September 1941. p. 9. Retrieved 5 September 2018.
  7. ^ a b "Press Release on Time Zone Adjustment" (PDF). National Archives of Singapore. 20 December 1981.
  8. ^ a b "Clocks will be set forward at 11.30 p.m. on Dec 31". The Straits Times. 21 December 1981. p. 1. Retrieved 6 September 2018.
  9. ^ a b "Tonight's revelry will end half-hour earlier". The Straits Times. 31 December 1981. p. 1. Retrieved 6 September 2018.
  10. ^ "Why is Singapore in the "Wrong" Time Zone?". nus.edu.sg. 28 June 2012.
  11. ^ "Time, Gentlemen, Please". The Singapore Free Press and Mercantile Advertiser (Weekly). 15 May 1894. p. 288. Retrieved 5 April 2019. Scroll to the bottom of article for time offset and Reference Meridian
  12. ^ "A Matter of Time". The Singapore Free Press and Mercantile Advertiser. 31 May 1905. p. 5. Retrieved 5 September 2018.
  13. ^ "National Time Scale of Singapore and Time-Dissemination". a-star.edu.sg.

External links[edit]