Time in Sakha

The Republic of Sakha is the only federal subject of Russia which uses more than one time zone. Sakha spans three time zones.[1]

Time zone	Abbr.	UTC offset	Areas
Yakutsk Time	YAKT	UTC+09:00	Most of the republic's territory.
Vladivostok Time	VLAT	UTC+10:00	Districts of Oymyakonsky, Ust-Yansky and Verkhoyansky.
Magadan Time	MAGT	UTC+11:00	Districts of Abyysky, Allaikhovsky, Momsky, Nizhnekolymsky, Srednekolymsky and Verkhnekolymsky.

Time zones in Sakha from 26 October 2014.

Yakutsk Time	UTC+09:00	(MSK+6)
Vladivostok Time	UTC+10:00	(MSK+7)
Magadan Time	UTC+11:00	(MSK+8)

History

Time zones in Sakha before September 2011.

	standard	DST
Yakutsk Time	UTC+09:00	UTC+10:00	(MSK+6)
Vladivostok Time	UTC+10:00	UTC+11:00	(MSK+7)
Magadan Time	UTC+11:00	UTC+12:00	(MSK+8)

Decree No. 725 of 31 August 2011 changed Moscow Time (MSK) from UTC+03:00, or UTC+04:00 during with seasonal daylight saving time (DST), to UTC+04:00 all year. Therefore, the time zones of Sakha, which were MSK+6, MSK+7 and MSK+8, changed from UTC+09:00, UTC+10:00 and UTC+11:00 (or UTC+10:00, UTC+11:00 and UTC+12:00 during DST) to UTC+10:00, UTC+11:00 and UTC+12:00 all year. As the decree took effect when DST was already observed, there was no change in local time in most of Sakha. However, the decree also changed the offset of some parts of Sakha with respect to Moscow Time (MSK), and thus to UTC.[2]

Time zone changes in Sakha in September 2011
Areas	Before			After
	MSK offset	UTC offset		MSK offset	UTC offset
	all year	standard	DST	all year
Oymyakonsky District	MSK+8	UTC+11:00	UTC+12:00	MSK+7	UTC+11:00
New Siberian Islands Tomponsky District Ust-Maysky District	MSK+7	UTC+10:00	UTC+11:00	MSK+6	UTC+10:00

On 26 October 2014, Moscow Time reverted to UTC+03:00, also without seasonal changes. The time offset in all parts of Sakha with respect to Moscow Time remained the same (MSK+6, MSK+7, MSK+8), but changed with respect to UTC (becoming again UTC+09:00, UTC+10:00, UTC+11:00).[3]

IANA time zone database

Country	Coordinates	Time zone name	IANA description	UTC offset	Districts
RU	+623923+1353314	Asia/Khandyga	MSK+06 - Tomponsky, Ust-Maysky	UTC+09:00	Tomponsky, Ust-Maysky
RU	+6728+15343	Asia/Srednekolymsk	MSK+08 - Sakha (E); North Kuril Is	UTC+11:00
RU	+643337+1431336	Asia/Ust-Nera	MSK+07 - Oymyakonsky	UTC+10:00	Oymyakonsky
RU	+6200+12940	Asia/Yakutsk	MSK+06 - Lena River	UTC+09:00
RU		Asia/Vladivostok	MSK+07 - ...	UTC+10:00	Ust-Yansky, Verkhoyansky

External links

http://efele.net/maps/tz/russia/ map showing IANA zones for Russia - five zones for Sakha

References

Federal law on the calculation of time, Official internet portal of legal information of the Russian Federation (in Russian).
Постановление Правительства Российской Федерации № 725 от 31 августа 2011 г. «О составе территорий, образующих каждую часовую зону, и порядке исчисления времени в часовых зонах, а также о признании утратившими силу отдельных постановлений Правительства Российской Федерации».
"New Russian time zones and the corresponding areas from October 26, 2014", World Time Zone, 22 July 2014.

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[1] Federal law on the calculation of time, Official internet portal of legal information of the Russian Federation (in Russian).

[2] Постановление Правительства Российской Федерации № 725 от 31 августа 2011 г. «О составе территорий, образующих каждую часовую зону, и порядке исчисления времени в часовых зонах, а также о признании утратившими силу отдельных постановлений Правительства Российской Федерации».

[3] "New Russian time zones and the corresponding areas from October 26, 2014", World Time Zone, 22 July 2014.