Chongming keeps UTC+8 (CST) all year. There is no daylight saving time, so the clock never changes.
Chongming and your time
Chongming at a glance
| Country | China |
|---|---|
| Time zone | Asia/Shanghai |
| Abbreviation now | CST |
| UTC offset now | UTC+8 |
| Daylight saving time | Not observed since 1991 |
| Coordinates | 31.62° N, 121.70° E |
Which time zone Chongming uses
The clocks in Chongming follow Asia/Shanghai and do not move with the seasons. The last daylight saving period here was in 1991. Since then the offset has stayed at UTC+8.
Although China has 2 different offsets, Chongming keeps the same time as Beijing.
Clock changes in Chongming, 2026 and 2027
No clock changes are scheduled in Chongming for 2026 or 2027.
Time difference between Chongming and other cities
When it is 9:00 AM in Chongming, it is 8:00 PM (previous day) in New York, 12:00 PM in Sydney and 5:00 PM (previous day) in Los Angeles.
| City | Time now | Difference now | In January | In July | Shared office hours |
|---|---|---|---|---|---|
| New York (United States) | --:-- | 13 h behind | 13 h behind | 12 h behind | None |
| Los Angeles (United States) | --:-- | 16 h behind | 16 h behind | 15 h behind | None |
| London (United Kingdom) | --:-- | 8 h behind | 8 h behind | 7 h behind | None |
| Paris (France) | --:-- | 7 h behind | 7 h behind | 6 h behind | 1 h |
| Dubai (United Arab Emirates) | --:-- | 4 h behind | 4 h behind | 4 h behind | 4 h |
| Mumbai (India) | --:-- | 2 h 30 min behind | 2 h 30 min behind | 2 h 30 min behind | 5 h 30 min |
| Singapore | --:-- | Same time | Same time | Same time | 8 h |
| Tokyo (Japan) | --:-- | 1 h ahead | 1 h ahead | 1 h ahead | 7 h |
| Sydney (Australia) | --:-- | 3 h ahead | 3 h ahead | 2 h ahead | 5 h |
| UTC | --:-- | 8 h behind | 8 h behind | 8 h behind | None |
Because Chongming keeps one offset all year, any change in the gap comes from the other city’s daylight saving time. Compare the January and July columns.
Shared office hours counts the time when the clock reads between 9 AM and 5 PM in both cities on the same day.
Sunrise, sunset and day length in Chongming
Today
| Sunrise | --:-- |
|---|---|
| Sunset | --:-- |
| Day length | -- |
| Solar noon | --:-- |
The earliest sunrise in Chongming is at 4:48 AM on June 12, and the latest sunset at 7:02 PM on June 30.
Daylight through the year in Chongming
| Date | Sunrise | Sunset | Day length | |
|---|---|---|---|---|
| March equinox | March 20 | 5:58 AM | 6:04 PM | 12 h 7 min |
| June solstice | June 21 | 4:49 AM | 7:01 PM | 14 h 13 min |
| September equinox | September 23 | 5:42 AM | 5:49 PM | 12 h 7 min |
| December solstice | December 22 | 6:49 AM | 4:54 PM | 10 h 5 min |
When the sun is highest in Chongming
Chongming lies close to the centre of its time zone, so the sun is highest at about 11:55 AM on standard time, close to clock noon.
Places close to Chongming
Every city below shares Chongming’s clock.
| City | Distance | Time now | Difference |
|---|---|---|---|
| Shanghai | 50 km (31 mi) | --:-- | Same time |
| Taicang | 60 km (37 mi) | --:-- | Same time |
| Kunshan | 75 km (47 mi) | --:-- | Same time |
| Nantong | 90 km (56 mi) | --:-- | Same time |
| Changshu | 90 km (56 mi) | --:-- | Same time |
| Suzhou | 110 km (68 mi) | --:-- | Same time |
| Zhangjiagang | 113 km (70 mi) | --:-- | Same time |
| Jiaxing | 132 km (82 mi) | --:-- | Same time |
More cities in China
All time zones and cities in China
Tools for time in Chongming
- Convert a time to or from Chongming: pick a date and time and see it in every city on your list.
- Add Chongming to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in Chongming and the other cities you work with.
- Open a full-screen clock for your own time zone.
Frequently asked questions
What time zone is Chongming in?
Chongming uses the Asia/Shanghai time zone, which is UTC+8 (CST) all year.
Does Chongming use daylight saving time?
Not any more. Chongming last changed its clocks for daylight saving time in 1991 and now stays on UTC+8 all year.
What is the time difference between Chongming and New York?
Chongming is 13 hours ahead of New York in January and 12 hours ahead of New York in July, because New York moves its clocks for daylight saving time and Chongming does not.
Is Chongming on the same time as Beijing?
Yes. Chongming and Beijing both use UTC+8 right now.
How long is the longest day in Chongming?
About 14 hours 13 minutes, around the June solstice. The shortest day, around the December solstice, has about 10 hours 5 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.