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East Timor uses UTC+09:00. In the west the country borders the UTC+08:00 zone of Central Indonesia and in the east the UTC+09:00 zone of that country. Daylight saving time is never observed in East Timor, due to its proximity to the equator; there is only a small variation between the length of day and night throughout the year. East Timor shares the same time zone with Japan Standard Time, Korean Standard Time, Pyongyang Time ( North Korea), Eastern Indonesia Standard Time, Palau Time, and Yakutsk Time ( Russia).

IANA time zone database

The IANA time zone database contains one zone for East Timor in the file zone.tab, which is named Asia/Dili.