South African Standard Time

Last updated
Time zones of Africa:

-01:00
Cape Verde Time
+-00:00
Greenwich Mean Time
+01:00
Central European Time
West Africa Time
+02:00
Central Africa Time
Eastern European Time
Egypt Standard Time
South African Standard Time
+03:00
East Africa Time
+04:00
Mauritius Time
Seychelles Time
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The islands of Cape Verde are to the west of the African mainland.

Mauritius and the Seychelles are to the east and north-east of Madagascar respectively. TimeZones-Africa.svg
Time zones of Africa:
  -01:00   Cape Verde Time
  ±00:00   Greenwich Mean Time
  +01:00  
  +02:00  
  +03:00   East Africa Time
  +04:00  
The islands of Cape Verde are to the west of the African mainland.
Mauritius and the Seychelles are to the east and north-east of Madagascar respectively.

South African Standard Time (SAST) is the time zone used by all of South Africa as well as Eswatini and Lesotho. The zone is two hours ahead of UTC (UTC+02:00) and is the same as Central Africa Time. Daylight saving time is not observed in either time zone. Solar noon in this time zone occurs at 30° E in SAST, effectively making Pietermaritzburg at the correct solar noon point, with Johannesburg and Pretoria slightly west at 28° E and Durban slightly east at 31° E. Thus, most of South Africa's population experience true solar noon at approximately 12:00 daily.

Contents

The western Northern Cape and Western Cape differ, however. Everywhere on land west of 22°30′ E effectively experiences year-round daylight saving time because of its location in true UTC+01:00 but still being in South African Standard Time. Sunrise and sunset are thus relatively late in Cape Town, compared to the rest of the country.

To illustrate, daylight hours for South Africa's western and easternmost major cities:

Summer solsticeWinter solstice
Cape Town 05:32–19:5707:51–17:45
Durban 04:52–18:5606:51–17:04

The South African National Time Standard, or 'SA Time' Master Clock, is maintained at the Time and Frequency Laboratory of the National Metrology Institute of South Africa (NMISA) at Pretoria and is distributed publicly by an NTP Internet Time service. [1] [2]

History

Before 8 February 1892, there was no uniformity of time in South Africa and local mean time was in use at the various towns. In 1892, a railway conference was held in Bloemfontein and discussed difficulty of working a railway system, in the absence of a uniform time system. The governments of the Orange Free State, Transvaal and the Cape Colony officially adopted a uniform standard time of UTC+01:30 which was defined as mean time 22.5° east of Greenwich. [3] On 1 March 1903 GMT+02:00 was adopted, which became the current UTC+02:00 when UTC replaced GMT for most purposes. [4] [5]

Prior to 1 March 1903, the Colony of Natal was already using a uniform time supplied by the Natal Observatory. The observatory's local mean time was (UTC+01:52).

South Africa observed a daylight saving time of GMT+03:00 (UTC+03:00) between 20 September 1942 to 21 March 1943 and 19 September 1943 to 19 March 1944. [6]

South African Standard Time is defined as "Coordinated Universal Time plus two hours" (UTC+02:00) as defined in South African National Government Gazette No. 40125 of 8 July 2016. [7]

See also

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Time in Iceland

Iceland observes UTC±00:00 year-round, known as Greenwich Mean Time or Western European Time. UTC±00:00 was adopted on 7 April 1968 – in order for Iceland to be in sync with Europe – replacing UTC−01:00, which had been the standard time zone since 16 November 1907. Iceland previously observed daylight saving time, moving the clock forward one hour, between 1917 and 1921, and 1939 and 1968. The start and end dates varied, as decided by the government. Between 1941 and 1946, daylight saving time commenced on the first Sunday in March and ended in late October, and between 1947 and 1967 it commenced on the first Sunday in April, in all instances since 1941 occurring and ending at 02:00. Since 1994, there have been an increasing number of proposals made to the Althing to reintroduce daylight saving time for a variety of reasons, but all such proposals and resolutions have been rejected.

Time in Sudan is given by a single time zone, officially denoted as Central Africa Time. Sudan has observed CAT since 1 November 2017. Sudan has not observed daylight saving time since 14 October 1985.

Africa, the world's second-largest and second-most populous continent, spans across six different time zone offsets from Coordinated Universal Time (UTC): UTC−01:00 to UTC+04:00. As Africa straddles the equator and tropics, there is little change in daylight hours throughout the year and as such daylight saving time is currently observed in only one country, Morocco, however it was also previously observed in several other countries.

References

  1. "Archived copy". Archived from the original on 13 February 2014. Retrieved 27 March 2014.{{cite web}}: CS1 maint: archived copy as title (link)
  2. "Archived copy". Archived from the original on 9 February 2014. Retrieved 27 March 2014.{{cite web}}: CS1 maint: archived copy as title (link)
  3. "Timezone change of 1892". TimeAndDate.com.
  4. Wood, H. E. (1927–1928). "1". Official Year Book of the Union of South Africa and of Basutoland, Bechuanaland Protectorate, and Swaziland. No. 10. p. 61.
  5. "Timezone change of 1903".
  6. "Timezone change of 1925 and 1949".
  7. "Government Gazette No: 40125" (PDF). 8 July 2016. Archived (PDF) from the original on 28 January 2020. Retrieved 28 January 2020.