Asia/Dili

Time zone identifier: Asia/Dili

Current civil offset: +09:00 (+09)

Current DST state: Observing Standard Time

First standard time adoption: Adopted on 1911-12-31

Local Mean Time (LMT): +08:22:20 based on geographic meridian

Total recorded transitions: 4 transitions across 3 distinct offsets

Associated countries: TL

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Historical Offset Step Chart (1880 to Present)

+7:00 +8:00 +9:00 +10:00 1880 1900 1920 1940 1960 1980 2000 2020

Text summary: Asia/Dili shifted between 3 distinct offsets from 1911-12-31 through the modern era.

Complete Transition History (4 Transitions)

UTC Instant Local Wall Time Shift Abbreviation DST Effect
1911-12-31T16:00:00Z 1912-01-01 00:00:00 +08:22:20 → +08:00 +08 No overlap
1942-02-21T15:00:00Z 1942-02-22 00:00:00 +08:00 → +09:00 +09 No gap
1976-05-02T15:00:00Z 1976-05-02 23:00:00 +09:00 → +08:00 +08 No overlap
2000-09-16T16:00:00Z 2000-09-17 01:00:00 +08:00 → +09:00 +09 No gap

Notes from the Maintainers

Source: asia (Lines 1210 to 1242)
East Timor

From Tim Parenti (2024-07-01):
The 1912-01-01 transition occurred at 00:00 new time, per the 1911-05-24
Portuguese decree (see Europe/Lisbon).  A provision in article 5(c) of the
decree prescribed that Timor "will keep counting time in harmony with
neighboring foreign colonies, [for] as long as they do not adopt the time
that belongs to them in [the Washington Convention] system."

See Indonesia for the 1945 transition.

From João Carrascalão, brother of the former governor of East Timor, in
East Timor may be late for its millennium
<https://etan.org/et99c/december/26-31/30ETMAY.htm> (1999-12-26/31):
Portugal tried to change the time forward in 1974 because the sun
rises too early but the suggestion raised a lot of problems with the
Timorese and I still don't think it would work today because it
conflicts with their way of life.

From Paul Eggert (2000-12-04):
We don't have any record of the above attempt.
Most likely our records are incomplete, but we have no better data.

From Manoel de Almeida e Silva, Deputy Spokesman for the UN Secretary-General
http://www.hri.org/news/world/undh/2000/00-08-16.undh.html
(2000-08-16):
The Cabinet of the East Timor Transition Administration decided
today to advance East Timor's time by one hour.  The time change,
which will be permanent, with no seasonal adjustment, will happen at
midnight on Saturday, September 16.

Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]

Attributed Statements:

Tim Parenti (2024-07-01):

The 1912-01-01 transition occurred at 00:00 new time, per the 1911-05-24 Portuguese decree (see Europe/Lisbon). A provision in article 5(c) of the decree prescribed that Timor "will keep counting time in harmony with neighboring foreign colonies, [for] as long as they do not adopt the time that belongs to them in [the Washington Convention] system." See Indonesia for the 1945 transition. From João Carrascalão, brother of the former governor of East Timor, in East Timor may be late for its millennium <https://etan.org/et99c/december/26-31/30ETMAY.htm> (1999-12-26/31): Portugal tried to change the time forward in 1974 because the sun rises too early but the suggestion raised a lot of problems with the Timorese and I still don't think it would work today because it conflicts with their way of life.

Paul Eggert (2000-12-04):

We don't have any record of the above attempt. Most likely our records are incomplete, but we have no better data. From Manoel de Almeida e Silva, Deputy Spokesman for the UN Secretary-General http://www.hri.org/news/world/undh/2000/00-08-16.undh.html (2000-08-16): The Cabinet of the East Timor Transition Administration decided today to advance East Timor's time by one hour. The time change, which will be permanent, with no seasonal adjustment, will happen at midnight on Saturday, September 16. Zone NAME STDOFF RULES FORMAT [UNTIL]

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.