South African Standard Time

South African Standard Time
Utc offset	+02:00
Dst	None
Tz	Africa/Johannesburg

South African Standard Time is the time zone observed throughout the Republic of South Africa. It is two hours ahead of Coordinated Universal Time and is maintained by the National Metrology Institute of South Africa. The zone aligns with Central Africa Time and shares its offset with major cities like Harare, Lusaka, and Maputo.

Time zone details

The official identifier for this zone in the IANA time zone database is Africa/Johannesburg. It corresponds to a mean solar time for the meridian at 30 degrees east longitude, which passes near the city of Pietermaritzburg. This places it within the same standard offset as the Eastern European Time zone during standard periods. The country does not observe daylight saving time, a policy shared with neighboring nations like Botswana and Mozambique. Timekeeping is legally defined under the South African Legal Time statute and is disseminated by the Time and Frequency Laboratory of the National Metrology Institute of South Africa.

History

Prior to the formal adoption of a national time, local mean time based on the longitude of major towns like Cape Town and Johannesburg was used. The current standard was established nationally in 1903, influenced by the need for railway synchronization following the Second Boer War. This move mirrored global standardization efforts led by the International Meridian Conference. For a brief period between 1942 and 1944, a form of daylight saving was trialed to conserve energy during World War II. The time zone has remained unchanged since the country's transition to democracy in 1994, overseen by the Government of South Africa.

Legal status

The legal basis is the Legal Time Act, 1989, which repealed the previous Standard Time Act, 1948. This legislation mandates the observance of this time throughout the national territory, including the Prince Edward Islands. The act designates the National Metrology Institute of South Africa, an agency of the Department of Trade, Industry and Competition, as the official timekeeper. The time signal is broadcast by the South African Broadcasting Corporation and is traceable to the International Bureau of Weights and Measures. Non-compliance with official time for public purposes can constitute an offense under certain regulations.

Geographic considerations

Geographically, most of South Africa lies within the ideal longitudinal band for this time zone. The westernmost parts, including Springbok in the Northern Cape, experience significant deviation between solar time and standard time. The eastern region, encompassing cities like Durban and Mbombela, aligns more closely with the solar noon. The zone also applies to the sub-Antarctic Prince Edward Islands, despite their remote location far from the mainland. This creates a situation where the islands' clock time is markedly out of sync with actual sunlight hours for much of the year.

Comparison with other time zones

It is identical to Central Africa Time used across much of the continent. When it is noon in Pretoria, it is also noon in Lusaka, Harare, and Lubumbashi. It is one hour ahead of West Africa Time observed in Nigeria and Ghana, and one hour behind East Africa Time used in Kenya and Tanzania. During the Northern Hemisphere summer, it matches Israel Standard Time and Eastern European Time. It is six hours ahead of Eastern Standard Time in New York City and seven hours ahead during Eastern Daylight Time.

Usage and observance

All nine provinces, from the Western Cape to Limpopo, observe this time uniformly. It governs the schedules of the Johannesburg Stock Exchange, OR Tambo International Airport, and Transnet freight rail. Major events like the South African general election and the Comrades Marathon are conducted according to it. Television schedules on DSTV and broadcasts by the South African Broadcasting Corporation adhere strictly to this standard. The South African National Defence Force and operations at Saldanha Bay also coordinate their activities using this official time.

Category:Time in South Africa