* 1 Time standards * 2 Timekeeping * 3 Daylight Saving * 4 See also * 5 References * 6 External links
In Hong Kong, Hong Kong Time is defined in the Interpretation and General Clauses Ordinance (Cap 1), Laws of Hong Kong.
Section 67(2) of the Ordinance states that:
" Hong Kong Time" (香港時間) means the time used for general purposes throughout Hong Kong namely, 8 hours, or such other period as may be determined by the Legislative Council by resolution under this subsection or under section 16 of the Oil (Conservation and Control) Ordinance (Cap 264), in advance of Universal Standard Time.
Currently, Hong Kong time is defined as UTC+8 . The reference in section 67(2) to the Oil (Conservation and Control) Ordinance is actually a power given to the Legislative Council of Hong Kong to change Hong Kong Time for the purposes of conserving oil, i.e. to implement daylight saving time. However, no daylight saving time has been observed since 1979.
The Hong Kong Time was first set to Local Mean Time (GMT+7:36:41) on 1 January 1885 at 13:00 by the then Royal Observatory Hong Kong. In 1904, the Greenwich Mean Time was adopted as the basis for Hong Kong Time, the time was set at 8 hours in advance of Greenwich Mean Time. The current Coordinated Universal Time system was adopted as an official time standard on 1 January 1972. However, the legal Hong Kong Time still remained based on Greenwich Mean Time until it was changed to Universal Standard Time in 1998 after the Hong Kong handover .