The first
time zone standard in
Taiwan was enforced on 1 January 1896, Time Memorial Day was observed every 10 June from 1921 to 1941, which led to an increase in the observance of an official time. After the war's end, Taiwan was annexed to the
five time zones system of the
Republic of China. It was classified in the "Chungyuan Standard Time" with a time offset of
UTC+08:00. After the
Chinese Civil War in 1949, the
Government of the Republic of China retreated to Taiwan and lost nearly all the territory in
mainland China. Since then, the five time zones system was no longer implemented except for the Chungyuan Standard Time in Taiwan. Because the term "Chungyuan" (
Zhongyuan) refers to the Central Plain of China, the government gradually phased out the name in favor of "National Standard Time". However, some radio channels continued using "Chungyuan", most notably the
Broadcasting Corporation of China until 2007. Other alternatives include "Taiwan Standard Time" () and "Taipei Time" ().
Daylight saving time was implemented in
Taiwan after the Second World War on the summer of 1946–1961, 1974, 1975, 1979. In October 2017, a petition took place to change the offset to
UTC+09:00, which was responded by an assessment of potential impact by the
government. == Present development ==