Cheonan keeps UTC+9 (KST) all year. There is no daylight saving time, so the clock never changes.
Cheonan and your time
Cheonan at a glance
| Country | South Korea |
|---|---|
| Region | Chungcheongnam-do |
| Time zone | Asia/Seoul |
| Abbreviation now | KST |
| UTC offset now | UTC+9 |
| Daylight saving time | Not observed since 1988 |
| Coordinates | 36.81° N, 127.15° E |
Time zone in Cheonan
Cheonan follows the Asia/Seoul time zone and stays on UTC+9 all year. Clocks here last changed for daylight saving time in 1988; the tz database lists no change after that.
Cheonan is on the same time as the rest of South Korea, including the capital, Seoul.
Clock changes in Cheonan, 2026 and 2027
No clock changes are scheduled in Cheonan for 2026 or 2027.
Cheonan time compared with major cities
A 9:00 AM start in Cheonan is 7:00 PM (previous day) in New York, 11:00 AM in Sydney and 4:00 PM (previous day) in Los Angeles.
| City | Time now | Difference now | In January | In July | Shared office hours |
|---|---|---|---|---|---|
| New York (United States) | --:-- | 14 h behind | 14 h behind | 13 h behind | None |
| Los Angeles (United States) | --:-- | 17 h behind | 17 h behind | 16 h behind | None |
| London (United Kingdom) | --:-- | 9 h behind | 9 h behind | 8 h behind | None |
| Paris (France) | --:-- | 8 h behind | 8 h behind | 7 h behind | None |
| Dubai (United Arab Emirates) | --:-- | 5 h behind | 5 h behind | 5 h behind | 3 h |
| Mumbai (India) | --:-- | 3 h 30 min behind | 3 h 30 min behind | 3 h 30 min behind | 4 h 30 min |
| Singapore | --:-- | 1 h behind | 1 h behind | 1 h behind | 7 h |
| Tokyo (Japan) | --:-- | Same time | Same time | Same time | 8 h |
| Sydney (Australia) | --:-- | 2 h ahead | 2 h ahead | 1 h ahead | 6 h |
| UTC | --:-- | 9 h behind | 9 h behind | 9 h behind | None |
Cheonan never changes its clocks, but many of these cities do. Where the January and July columns disagree, the gap shifts when the other city moves to or from daylight saving time.
Shared office hours counts the time when the clock reads between 9 AM and 5 PM in both cities on the same day.
Daylight in Cheonan
Today
| Sunrise | --:-- |
|---|---|
| Sunset | --:-- |
| Day length | -- |
| Solar noon | --:-- |
The earliest sunrise in Cheonan is at 5:12 AM on June 13, and the latest sunset at 7:55 PM on June 29.
Daylight through the year in Cheonan
| Date | Sunrise | Sunset | Day length | |
|---|---|---|---|---|
| March equinox | March 20 | 6:36 AM | 6:43 PM | 12 h 7 min |
| June solstice | June 21 | 5:13 AM | 7:54 PM | 14 h 41 min |
| September equinox | September 23 | 6:20 AM | 6:28 PM | 12 h 8 min |
| December solstice | December 22 | 7:41 AM | 5:19 PM | 9 h 38 min |
Clock time and sun time in Cheonan
Cheonan lies close to the centre of its time zone, so the sun is highest at about 12:30 PM on standard time, close to clock noon.
Places close to Cheonan
All the places listed below keep the same time as Cheonan.
| City | Distance | Time now | Difference |
|---|---|---|---|
| Pyeongtaek | 22 km (13 mi) | --:-- | Same time |
| Sejong | 27 km (17 mi) | --:-- | Same time |
| Cheongju | 35 km (22 mi) | --:-- | Same time |
| Osan | 39 km (24 mi) | --:-- | Same time |
| Suwon | 54 km (33 mi) | --:-- | Same time |
| Hwaseong | 54 km (33 mi) | --:-- | Same time |
| Daejeon | 55 km (34 mi) | --:-- | Same time |
| Icheon | 59 km (36 mi) | --:-- | Same time |
More cities in South Korea
All time zones and cities in South Korea
Tools for time in Cheonan
- Convert a time to or from Cheonan: pick a date and time and see it in every city on your list.
- Add Cheonan to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in Cheonan and the other cities you work with.
- Open a full-screen clock for your own time zone.
Frequently asked questions
What time zone is Cheonan in?
Cheonan uses the Asia/Seoul time zone, which is UTC+9 (KST) all year.
Does Cheonan use daylight saving time?
Not any more. Cheonan last changed its clocks for daylight saving time in 1988 and now stays on UTC+9 all year.
What is the time difference between Cheonan and New York?
Cheonan is 14 hours ahead of New York in January and 13 hours ahead of New York in July, because New York moves its clocks for daylight saving time and Cheonan does not.
Is Cheonan on the same time as Seoul?
Yes. Cheonan and Seoul both use UTC+9 right now.
How long is the longest day in Cheonan?
About 14 hours 41 minutes, around the June solstice. The shortest day, around the December solstice, has about 9 hours 38 minutes of daylight.
Time zone rules: IANA tz database, version 2026e. Place names and coordinates: GeoNames. Sunrise and sunset are calculated from the coordinates and can differ by a minute or two from local almanacs.