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Asia/Hong_Kong time zone

8:57PMHKT

HKTUTC+8+13 h vs New York (you)

No transitions: Asia/Hong_Kong stays on HKT (UTC+8).

About Asia/Hong_Kong

Asia/Hong_Kong is the IANA time zone for Hong Kong. It currently keeps Hong Kong Standard Time (HKT, UTC+8) all year.

Its principal location is Hong Kong at 22.28° N, 114.15° E.

Abbreviations in use: HKT. Offset page: UTC+8.

Rule for future years (POSIX TZ string)

HKT-8

The standard time is called HKT and is UTC+8. POSIX writes the offset with the opposite sign (west of Greenwich is positive), which is why the string says "-8". There is no daylight saving rule: the zone stays on this offset for every year after the end of its explicit transitions. Software that has no full tzdata copy, such as many embedded devices, can use this string directly as the TZ environment variable.

History of Asia/Hong_Kong since 1970

The record starts with local mean time (UTC+7:37), which ended on October 30, 1904. The first daylight saving time in the record is in 1941.

YearsClocksAbbreviations
1970–1973UTC+8 in winter, UTC+9 in summerHKT, HKST
1974UTC+9 until October 20, then UTC+8HKST, HKT
1975–1976UTC+8 in winter, UTC+9 in summerHKT, HKST
1977–1978UTC+8 all yearHKT
1979UTC+8 in winter, UTC+9 in summerHKT, HKST
1980 onwardUTC+8 all yearHKT

Before 1970

53 offset changes before 1970 in the record; the first 12 and the last 12:

tzdata commits to accuracy from 1970 for every zone (zone1970.tab); earlier entries are historical research and may be incomplete.

Aliases and zones with the same clock

These older or country-specific IDs are links to Asia/Hong_Kong in tzdata. Their pages redirect here: Hongkong.

Other zones that keep exactly the same time under the current rules (but have a different history): Antarctica/Casey, Asia/Irkutsk, Asia/Kuching, Asia/Macau, Asia/Makassar, Asia/Manila, Asia/Shanghai, Asia/Singapore, Asia/Taipei, Asia/Ulaanbaatar, Australia/Perth.

Places on Asia/Hong_Kong

Convert Hong Kong time

Tip: Alt+↑/↓ steps the time by 15 minutes (Shift: one hour). The link keeps the date, time and direction.

Using Asia/Hong_Kong in code

Every major platform reads the same IANA ID. Store instants in UTC and convert with the ID at display time; never store a fixed offset for a place that has daylight saving time.

// JavaScript
new Date().toLocaleString('en-US', { timeZone: 'Asia/Hong_Kong' })

# Python 3.9+
from zoneinfo import ZoneInfo
from datetime import datetime
datetime.now(ZoneInfo('Asia/Hong_Kong'))

// Java
java.time.ZonedDateTime.now(java.time.ZoneId.of("Asia/Hong_Kong"))

// Go
loc, _ := time.LoadLocation("Asia/Hong_Kong")
time.Now().In(loc)

-- PostgreSQL
SELECT now() AT TIME ZONE 'Asia/Hong_Kong';

# Shell
TZ='Asia/Hong_Kong' date

Platforms ship their own copy of tzdata and update it on their own schedule. After a rule change, outputs can differ until the platform updates; this page uses tzdata 2026f.

Questions

What is the UTC offset of Asia/Hong_Kong?
UTC+8 all year.
Does Asia/Hong_Kong observe daylight saving time?
No, not under the current rules. The last year with daylight saving time in its record is 1979.
Is Hongkong the same as Asia/Hong_Kong?
Yes. Hongkong is a link (alias) to Asia/Hong_Kong in tzdata and gives the same time since 1970. It remains a valid ID.
Which countries use Asia/Hong_Kong?
Hong Kong, according to zone1970.tab in tzdata.

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