Time in Indonesia

Indonesia is divided into three time zones: These time zones have existed in their present form since 1 January 1988. ==The history of time divisions==

Early timekeeping The first regulation of time was implemented in 1908 at the request of the Staatsspoorwegen Dutch railway company in Java during the time of the Dutch East Indies. The time in Central Java was set at 12 minutes later than the capital, Batavia, which used GMT +7 hours. This regulation, which came into effect on 1 May 1908, applied only to Java and Madura. Time in the rest of the archipelago remained unregulated. Ten years later, on 22 February 1918, time in Padang, Sumatra was set at 39 minutes ahead of Central Java, while time in Palembang was set at 8 hours and 20 minutes ahead of Greenwich Mean Time. Then, on 1 January 1924, times for various locations were set as follows: Standardised time zones In 1932, the Dutch colonial government through a dated 27 July published in No. 412, divided the entire colony into six time zones separated by 30 minutes as follows: During the Japanese occupation of the Dutch East Indies, from 27 March 1942 to 24 September 1945, both western and central parts of Indonesia used Japan Standard Time (JST) (UTC+09:00) for the sake of the effectiveness of Japanese military operations in Indonesia. Time zones post-independence When the Dutch returned in 1945, they reimposed three time zones (GMT +6, +7 and +8), with a separate GMT +9 time zone for Dutch New Guinea. Following Dutch recognition of Indonesian sovereignty, a presidential regulation came into effect on 1 May 1950 once again dividing the country into six time zones separated by half an hour. Then, on 1 January 1964, another presidential decree came into effect, imposing the current system of three time zones. The final change came on 1 January 1988 when Bali was moved out of the West Indonesia time zone into the Central Indonesia time zone, and West and Central Kalimantan were transferred from Central to West Indonesian Time. ==Proposal for a single time zone==

On 12 March 2012, Coordinating Minister for the Economy Hatta Rajasa said: "According to research, with a single time zone the country could cut costs by trillions of rupiah." Two months later, The Jakarta Post reported that a single time zone using UTC+08:00 may start on 28 October 2012. However, in August, the Jakarta Globe reported that the plan was now on hold. In January 2013, a deputy minister said the idea had been abandoned after missing two target dates: 17 August (Independence day) and 28 October 2012 (Youth Pledge day). Later that year, Rajasa claimed that the plan had not been abandoned, although there was no deadline for implementation. ==IANA time zone database==

In the IANA time zone database, Indonesia is given four zones in the file zone.tab: Asia/Jakarta serving Sumatra and Java; Asia/Pontianak serving West and Central Kalimantan; Asia/Makassar serving East Kalimantan, South Kalimantan, the Lesser Sunda Islands, and Sulawesi; and Asia/Jayapura serving the Maluku Islands, Papua, and West Papua. The first two zones use WIB, while the third and last use WITA and WIT, respectively. ==See also==