Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

China to Sri Lanka

-2h 30m

China

CSTSOURCE

UTC+08:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Sri Lanka

IST

UTC+05:30

HH09

MM30

09:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

China

Sri Lanka

12:00 AM

9:30 PM-1

2:00 AM

11:30 PM-1

4:00 AM

1:30 AM

6:00 AM

3:30 AM

8:00 AM

5:30 AM

10:00 AM

7:30 AM

12:00 PM

9:30 AM

2:00 PM

11:30 AM

4:00 PM

1:30 PM

6:00 PM

3:30 PM

8:00 PM

5:30 PM

10:00 PM

7:30 PM

Green 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 Zone

→

IST Zone

Explore all world timezones interactively →

CST – China Standard Time

UTC+08:00

China Standard Time (CST) covers all of mainland China, 8 hours ahead of UTC.

Countries in CST

ChinaHong KongMacauTaiwan

Major Cities in CST

ShanghaiBeijingShenzhenGuangzhouChengduHong KongTaipeiWuhanHangzhouNanjing

Key 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.
•China abolished daylight saving time in 1991.
•The Shanghai Stock Exchange operates on CST/Beijing Time.

Daylight Saving:No – UTC+08:00 year-round

Learn more about CST on Wikipedia

IST – India Standard Time

UTC+05:30

India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.

Countries in IST

IndiaSri Lanka

Major Cities in IST

MumbaiDelhiBangaloreKolkataChennaiHyderabadPuneAhmedabadColomboJaipurLucknowSurat

Key Facts about IST

•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.

Daylight Saving:No – UTC+05:30 year-round

Learn more about IST on Wikipedia

Comparing Time Zones: China and Sri Lanka

China runs on China Standard Time (CST) at UTC+08:00. Sri Lanka runs on India Standard Time (IST) at UTC+05:30. That puts China 2 hours 30 minutes behind Sri Lanka — a difference of -2h 30m at the current offsets.

In practice, when it is 9:00 AM in China it is 6:30 AM in Sri Lanka. Midnight in China is 9:30 PM in Sri Lanka. Neither zone observes daylight saving time, so the offset between them stays constant all year.

China to Sri Lanka time conversion table

China (CST)	Sri Lanka (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 China to Sri Lanka time

Scheduling a call from China to Sri Lanka: a 10:00 AM start in China lands at 7:30 AM in Sri Lanka, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both China and Sri Lanka 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 Sri Lanka local time against China 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 China and need Sri Lanka 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 China and Sri Lanka

Both China and Sri Lanka 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

China and Sri Lanka share 5 hours of working-hours overlap (11:30 AM–5:00 PM CST), so scheduling a live meeting is straightforward.

China is 2 hours 30 minutes behind Sri Lanka (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:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between China and Sri Lanka?

China (CST, UTC+08:00) is 2 hours 30 minutes behind Sri Lanka (IST, UTC+05:30). The gap is currently -2h 30m.

How do I convert China time to Sri Lanka time?

Add -2h 30m to China local time. For example, 9:00 AM in China is 6:30 AM in Sri Lanka.

What time is it in Sri Lanka right now?

Sri Lanka 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 China.