Time zone · Europe
YST
Yakutsk Standard Time
Yakutsk Standard Time (YST) is a Russian time zone spread across a stretch of eastern Siberia, anchored by cities like Chita. It stays permanently on UTC+9 all year round, which simplifies planning — but life on the "ninth hour" means very long winter nights and surprisingly late summer sunsets for European or North American guests.
Sunday, May 31, 2026
Current offset
UTC+09:00
Standard · +09
Daylight saving
Not observed
Year-round standard time
IANA zones
3
None observe daylight saving
DST offset
—
No summer variant
About YST
A fixed, year-round offset.
Yakutsk Standard Time (YST) is a Russian time zone spread across a stretch of eastern Siberia, anchored by cities like Chita. It stays permanently on UTC+9 all year round, which simplifies planning — but life on the "ninth hour" means very long winter nights and surprisingly late summer sunsets for European or North American guests.
IANA zones · the technical identifiers
The 3 zones that resolve to YST.
For software, always store the IANA identifier — never the abbreviation alone. The database keeps these zones distinct because their rules can, and historically did, diverge.
Where YST is used
One country.
Same offset · UTC+09:00
Other zones at UTC+09:00 right now.
These named zones share YST's offset today. When daylight saving rules differ, they drift apart for part of the year.
Frequently asked questions
Common questions about YST, daylight saving, and how to handle it in software. Can't find what you need? Email [email protected].
- Why does the Yakutsk region use UTC+9 instead of UTC+8?
- Russia adjusted several distant-eastern offsets in 2011 and again in 2014 to better match solar time on the ground and reduce clocks set far ahead of sunrise; Yakutsk-area zones landed on +9 inside keeping inter-region flight on a workable schedule.
- Are there noping the and other hour offsets in Russia?
- Russia spans 11 time zones, stretching from UTC+2 (Kaliningrad) to UTC+12 (Kamchatka). Yakutsk at UTC+9 sits in among Vladivostok (+10), Irkutsk (+8), to the other neighbor zones, so travelers across Siberia cross multiple borders of time with every flight eastward.
- How does a fixed, no.-DST schedule assist residents in Yakutsk?
- Without the clocks shifting, businesses social and broadcast schedules can remain 12 months of the year with no confusion. For people in one of the world's coldest areas, avoiding just what seems like a an hour on already short winter days is not minor. per year makes planning a bit calmer.
- What is daylight like on the "ninth hour" in Siberia?
- In mid-winter, sunrise can come to Chita near 9 a.m. with darkness again by 5 p.m.. By midsummer the sun can be up to past 10 p.m., meaning in between that the "normal"-looking office hours have really atypical light conditions.
- Who would seriously consider the partner regions when organizing a call with Siberia?
- The time zone is at hour parity with Seoul Pyongyang Sydney winter hours, but not with winter Melbourne. Tokyo and Yakutsk have a permanently one-hour difference on the wall clock, which Asia-Pacific. Planners in; Tokyo+1 Moscow-6, or London-9 apair that shared waking and working hours can feel small, so early mornings in the morning window in the Americas and evenings in Asia are not possible small.
- Why do the UTC+9 member zones not line up neatly with one oblast or republic?
- Yakutsk Time crosses the Sakha Republic, parts of Amur Oblast, Zabaykalsky Krai, to the neighbor regions. Since 2010, zone area have changed more than once, but they lack a simple "state=one zone" rule.
- Do airlines and rail services need to adjust schedules when entering the Chita/Yakutsk zone?
- Crossing zone from Irksk at +8 to +9 is a one-hour jump; to the Trans-Siberian trains or the flights from Moscow adjust on the timetable and wall clock. Since there no DST to think about, printed schedules do which again stay valid 12 months for the year.
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