Beijing to Colombo
-2h 30mBeijing
CSTSOURCEColombo
ISTGreen rows indicate typical business hours (9 AM - 5 PM)
CST and IST on the World Map
The map below highlights the CST (China Standard Time) and IST (India Standard Time) timezone regions across the globe.
CST – China Standard Time
UTC+08:00China Standard Time (CST) covers all of mainland China, 8 hours ahead of UTC.
- •China uses a single time zone despite spanning 5 geographical zones.
- •In Xinjiang (western China), sunset can be as late as midnight in summer.
- •China abolished daylight saving time in 1991.
- •The Shanghai Stock Exchange operates on CST/Beijing Time.
IST – India Standard Time
UTC+05:30India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.
- •India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT.
- •India uses a single time zone despite spanning 30° of longitude.
- •IST is one of only a handful of time zones with a 30-minute offset.
- •IST is the most populous single time zone in the world with over 1.4 billion people.
- •The Bombay Stock Exchange (BSE) and National Stock Exchange (NSE) operate on IST.
About Colombo
WikipediaColombo operates on Sri Lanka Time (SLST), UTC+5:30. Sharing India's timezone, Colombo is a key South Asian trade and tourism hub.
Sri Lanka Standard Time (SLST) uses UTC+5:30, same offset as India.
Comparing Time Zones: Beijing and Colombo
Beijing runs on China Standard Time (CST) at UTC+08:00. Colombo runs on India Standard Time (IST) at UTC+05:30. That puts Beijing 2 hours 30 minutes behind Colombo — a difference of -2h 30m at the current offsets.
In practice, when it is 9:00 AM in Beijing it is 6:30 AM in Colombo. Midnight in Beijing is 9:30 PM in Colombo. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Beijing to Colombo time conversion table
| Beijing (CST) | Colombo (IST) | Day |
|---|---|---|
| 12:00 AM | 9:30 PM | previous day |
| 6:00 AM | 3:30 AM | same day |
| 7:00 AM | 4:30 AM | same day |
| 8:00 AM | 5:30 AM | same day |
| 9:00 AM | 6:30 AM | same day |
| 12:00 PM | 9:30 AM | same day |
| 3:00 PM | 12:30 PM | same day |
| 5:00 PM | 2:30 PM | same day |
| 6:00 PM | 3:30 PM | same day |
| 9:00 PM | 6:30 PM | same day |
Why people convert Beijing to Colombo time
- Scheduling a call from Beijing to Colombo: a 10:00 AM start in Beijing lands at 7:30 AM in Colombo, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Beijing and Colombo are inside the 9-to-5 working day between 11:30 AM and 5:00 PM CST time (9:00 AM–2:30 PM IST). That is roughly 5 hours 30 minutes of usable overlap.
- Booking travel or deliveries: tracking Colombo local time against Beijing keeps pickup windows and arrival estimates honest across the -2h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM CST" is unambiguous; "3 PM" across a -2h 30m gap is not.
- Block 11:30 AM–5:00 PM CST as the recurring meeting window if you work primarily from Beijing and need Colombo colleagues present.
About CST (China Standard Time)
China Standard Time (CST, also known as Beijing Time) is used across all of mainland China despite the country spanning five geographical time zones. This single-timezone policy was adopted in 1949. China does not observe daylight saving time. CST is shared with Hong Kong (HKT), Macau, Taiwan, Singapore, Malaysia, and the Philippines, making UTC+08:00 one of the most used offsets in the world.
About IST (India Standard Time)
India Standard Time (IST) is the time observed throughout India and Sri Lanka. It is based on the 82.5°E meridian, passing through Mirzapur in Uttar Pradesh. India uses a single time zone despite spanning roughly 30° of longitude, which has been debated. IST does not observe daylight saving time. India is the world's most populous country, making IST one of the most-used time zones globally. The IT outsourcing industry and call centers operate primarily on IST, making the EST-to-IST conversion one of the most searched timezone conversions.
Best time to call between Beijing and Colombo
Both Beijing and Colombo sit inside the 9 AM – 5 PM working day between 11:30 AM–5:00 PM CST, which is 9:00 AM–2:30 PM IST. That gives roughly 5 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Beijing and Colombo share 5 hours of working-hours overlap (11:30 AM–5:00 PM CST), so scheduling a live meeting is straightforward.
Beijing is 2 hours 30 minutes behind Colombo (CST UTC+08:00 → IST UTC+05:30). The shared working window is 11:30 AM–5:00 PM CST. Remember to re-check around daylight-saving transitions.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Beijing and Colombo?
Beijing (CST, UTC+08:00) is 2 hours 30 minutes behind Colombo (IST, UTC+05:30). The gap is currently -2h 30m.
How do I convert Beijing time to Colombo time?
Add -2h 30m to Beijing local time. For example, 9:00 AM in Beijing is 6:30 AM in Colombo.
What time is it in Colombo right now?
Colombo uses IST at UTC+05:30. Use the live converter at the top of this page — it updates in real time and already accounts for the -2h 30m offset from Beijing.
What is the best time to call Colombo from Beijing?
Call between 11:30 AM and 5:00 PM CST — that maps to 9:00 AM–2:30 PM IST and keeps both parties inside the working day.
Which is behind, Beijing or Colombo?
Beijing is 2 hours 30 minutes behind Colombo. When it is 12:00 PM in Beijing it is 9:30 AM in Colombo.
Do Beijing and Colombo use different time zones?
Beijing (China) uses CST at UTC+08:00, while Colombo (Sri Lanka) uses IST at UTC+05:30. The IANA identifiers are Asia/Shanghai and Asia/Colombo.
Does daylight saving time affect the Beijing–Colombo difference?
Neither zone observes daylight saving time, so the -2h 30m offset between Beijing and Colombo is fixed all year.
Which other cities share Beijing's time zone?
CST also covers Shanghai, Beijing, Shenzhen, Guangzhou, Chengdu, Hong Kong, Taipei, Wuhan and 2 more.
Which countries use CST, Beijing's zone?
CST is used in China, Hong Kong, Macau, Taiwan.
Is there a day difference between Beijing and Colombo?
Not normally. The -2h 30m gap only pushes the date over the previous day.
What is the time difference between Beijing and Colombo?
Colombo is -2h 30m from Beijing.
What timezone is Beijing in?
Beijing operates on its local timezone.
What timezone is Colombo in?
Colombo operates on Sri Lanka Time (SLST), UTC+5:30. Sharing India's timezone, Colombo is a key South Asian trade and tourism hub.
What are the business hours in Colombo?
Standard business hours in Colombo are 9:00 AM - 5:00 PM IST.
Which countries use CST (China Standard Time)?
CST is used in China, Hong Kong, Macau, Taiwan.
Does CST observe daylight saving time?
No, CST does not observe daylight saving time and remains at UTC+08:00 year-round.
What are some interesting facts about CST?
China uses a single time zone despite spanning 5 geographical zones. In Xinjiang (western China), sunset can be as late as midnight in summer.
Which cities are in the IST timezone?
Major cities in the IST timezone include Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, Pune, Ahmedabad.
What is the UTC offset for IST?
India Standard Time (IST) is at UTC+05:30.
What should I know about the IST timezone?
India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT. India uses a single time zone despite spanning 30° of longitude.
When is it midnight in Beijing, what time is it in Colombo?
When it is 12:00 AM (midnight) in Beijing (CST), it is -2h 30m later in Colombo (IST).
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