Philippine Standard Time
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Philippine Standard Time (PST) or unofficially, Philippine Time (PHT), is the name used in the Philippines to describe its location among the world's time zones. Geographically, the Philippines lies within 116° 40' and 126° 34' east of the Prime Meridian, and as such is physically located within the UTC+8 time zone. The time zone also includes areas such as Western Australia, China, Hong Kong, Central Indonesia, Malaysia and Singapore. Philippine Standard Time is maintained by the Philippine Atmospheric, Geophysical and Astronomical Services Administration, or PAGASA.
The basis for Philippine Standard Time is the current time in Manila. However, due to geography, some areas are either ahead or behind standard Philippine Standard Time. This can be felt in some areas, where the official time in Davao City, for example, is fifteen minutes ahead of the time in Manila.
Modern Philippine Standard Time was instituted through Batas Pambansa Blg. 8, the law defining the metric system, which was approved on December 2, 1978 and implemented on January 1, 1983. In the 1990s, due to frequent power outages, daylight saving time was instituted. It ended a few years later as the Philippine power supply and transmission systems improved and is presently not in use.

