Asia/Hong_Kong

Time zone identifier: Asia/Hong_Kong

Current civil offset: +08:00 (HKT)

Current DST state: Observing Standard Time

First standard time adoption: Adopted on 1904-10-29

Local Mean Time (LMT): +07:36:42 based on geographic meridian

Total recorded transitions: 69 transitions across 4 distinct offsets

Associated countries: HK

Aliases (Link targets): Hongkong

Historical Offset Step Chart (1880 to Present)

Text summary: Asia/Hong_Kong shifted between 4 distinct offsets from 1904-10-29 through the modern era.

Complete Transition History (69 Transitions)

UTC Instant	Local Wall Time	Shift	Abbreviation	DST	Effect
`1904-10-29T17:00:00Z`	`1904-10-30 01:00:00`	+07:36:42 → +08:00	`HKT`	No	gap
`1941-06-14T19:00:00Z`	`1941-06-15 04:00:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1941-09-30T19:00:00Z`	`1941-10-01 03:30:00`	+09:00 → +08:30	`HKWT`	Yes	overlap
`1941-12-24T15:30:00Z`	`1941-12-25 00:30:00`	+08:30 → +09:00	`JST`	No	gap
`1945-11-17T17:00:00Z`	`1945-11-18 01:00:00`	+09:00 → +08:00	`HKT`	No	overlap
`1946-04-20T16:00:00Z`	`1946-04-21 01:00:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1946-11-30T19:30:00Z`	`1946-12-01 03:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1947-04-12T19:30:00Z`	`1947-04-13 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1947-11-29T19:30:00Z`	`1947-11-30 03:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1948-05-01T19:30:00Z`	`1948-05-02 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1948-10-30T19:30:00Z`	`1948-10-31 03:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1949-04-02T19:30:00Z`	`1949-04-03 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1949-10-29T19:30:00Z`	`1949-10-30 03:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1950-04-01T19:30:00Z`	`1950-04-02 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1950-10-28T19:30:00Z`	`1950-10-29 03:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1951-03-31T19:30:00Z`	`1951-04-01 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1951-10-27T19:30:00Z`	`1951-10-28 03:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1952-04-05T19:30:00Z`	`1952-04-06 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1952-11-01T19:30:00Z`	`1952-11-02 03:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1953-04-04T19:30:00Z`	`1953-04-05 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1953-10-31T18:30:00Z`	`1953-11-01 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1954-03-20T19:30:00Z`	`1954-03-21 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1954-10-30T18:30:00Z`	`1954-10-31 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1955-03-19T19:30:00Z`	`1955-03-20 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1955-11-05T18:30:00Z`	`1955-11-06 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1956-03-17T19:30:00Z`	`1956-03-18 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1956-11-03T18:30:00Z`	`1956-11-04 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1957-03-23T19:30:00Z`	`1957-03-24 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1957-11-02T18:30:00Z`	`1957-11-03 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1958-03-22T19:30:00Z`	`1958-03-23 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1958-11-01T18:30:00Z`	`1958-11-02 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1959-03-21T19:30:00Z`	`1959-03-22 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1959-10-31T18:30:00Z`	`1959-11-01 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1960-03-19T19:30:00Z`	`1960-03-20 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1960-11-05T18:30:00Z`	`1960-11-06 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1961-03-18T19:30:00Z`	`1961-03-19 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1961-11-04T18:30:00Z`	`1961-11-05 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1962-03-17T19:30:00Z`	`1962-03-18 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1962-11-03T18:30:00Z`	`1962-11-04 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1963-03-23T19:30:00Z`	`1963-03-24 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1963-11-02T18:30:00Z`	`1963-11-03 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1964-03-21T19:30:00Z`	`1964-03-22 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1964-10-31T18:30:00Z`	`1964-11-01 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1965-04-17T19:30:00Z`	`1965-04-18 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1965-10-16T18:30:00Z`	`1965-10-17 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1966-04-16T19:30:00Z`	`1966-04-17 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1966-10-15T18:30:00Z`	`1966-10-16 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1967-04-15T19:30:00Z`	`1967-04-16 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1967-10-21T18:30:00Z`	`1967-10-22 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1968-04-20T19:30:00Z`	`1968-04-21 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1968-10-19T18:30:00Z`	`1968-10-20 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1969-04-19T19:30:00Z`	`1969-04-20 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1969-10-18T18:30:00Z`	`1969-10-19 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1970-04-18T19:30:00Z`	`1970-04-19 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1970-10-17T18:30:00Z`	`1970-10-18 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1971-04-17T19:30:00Z`	`1971-04-18 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1971-10-16T18:30:00Z`	`1971-10-17 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1972-04-15T19:30:00Z`	`1972-04-16 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1972-10-21T18:30:00Z`	`1972-10-22 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1973-04-21T19:30:00Z`	`1973-04-22 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1973-10-20T18:30:00Z`	`1973-10-21 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1973-12-29T19:30:00Z`	`1973-12-30 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1974-10-19T18:30:00Z`	`1974-10-20 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1975-04-19T19:30:00Z`	`1975-04-20 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1975-10-18T18:30:00Z`	`1975-10-19 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1976-04-17T19:30:00Z`	`1976-04-18 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1976-10-16T18:30:00Z`	`1976-10-17 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap
`1979-05-12T19:30:00Z`	`1979-05-13 04:30:00`	+08:00 → +09:00	`HKST`	Yes	gap
`1979-10-20T18:30:00Z`	`1979-10-21 02:30:00`	+09:00 → +08:00	`HKT`	No	overlap

Notes from the Maintainers

Source: asia (Lines 846 to 847)

Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
STDOFF	7:36:41.7

Years on Record

Methodology Note: The 1970 Rule

tzdb guarantees accuracy for timestamps from 1970 onwards. Transitions prior to 1970 represent best-effort historical reconstructions.