Time zone · Europe
YST
Yakutsk Standard Time
Yakutsk Standard Time covers three zones in Russia, all on UTC+09:00 year-round. Russia stopped daylight saving time in 2011, and all three zones have shared UTC+09:00 since Chita joined in 2016. If you are working with colleagues across this region, expect the same simple offset all year.
Thursday, October 15, 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 covers three zones in Russia, all on UTC+09:00 year-round. Russia stopped daylight saving time in 2011, and all three zones have shared UTC+09:00 since Chita joined in 2016. If you are working with colleagues across this region, expect the same simple offset all year.
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.
Convert
YST to the world's clocks.
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].
- What countries use Yakutsk Standard Time?
- Only Russia. All three zones — Chita, Khandyga and Yakutsk — are in Russia.
- Does YST ever observe daylight saving time?
- No. None of these zones observe daylight saving time, and no clock changes are scheduled.
- When did YST freeze at UTC+09:00?
- Since March 27, 2016, all member zones have held a permanent offset of UTC+09:00.
- Why did YST stop observing daylight saving time?
- Russia abolished seasonal clock changes in 2011. In 2014 it moved most regions back one hour to permanent winter time, which put Yakutsk and Khandyga on UTC+09:00; Chita moved to UTC+09:00 in 2016.
- Is Yakutsk Time the same in Chita and Khandyga?
- Yes. All three zones share the same offset and do not observe daylight saving time.
- How do I sync schedules with YST?
- Use UTC+09:00 as a fixed offset all year — no daylight saving adjustments are needed.
Source: IANA tzdb2026d · Reviewed
Free · Developer API
This time zone, as JSON.
Its defining offset, DST status and member counts, from one endpoint.
Also in the API: time zones by coordinates, conversions that flag daylight saving gaps, and abbreviations decoded.
Moving off WorldTimeAPI? Our drop-in replacement needs no key.