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).

Indonesia to China

+1h

Indonesia

WIBSOURCE

UTC+07:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

China

CST

UTC+08:00

HH01

MM00

13:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Indonesia

China

12:00 AM

1:00 AM

2:00 AM

3:00 AM

4:00 AM

5:00 AM

6:00 AM

7:00 AM

8:00 AM

9:00 AM

10:00 AM

11:00 AM

12:00 PM

1:00 PM

2:00 PM

3:00 PM

4:00 PM

5:00 PM

6:00 PM

7:00 PM

8:00 PM

9:00 PM

10:00 PM

11:00 PM

Green rows indicate typical business hours (9 AM - 5 PM)

WIB and CST on the World Map

The map below highlights the WIB (Western Indonesia Time) and CST (China Standard Time) timezone regions across the globe.

WIB Zone

→

CST Zone

Explore all world timezones interactively →

WIB – Western Indonesia Time

UTC+07:00

Western Indonesia Time (WIB, UTC+07:00) covers Java, Sumatra and West Kalimantan, including Jakarta.

Countries in WIB

Indonesia (Java, Sumatra, West Kalimantan)

Major Cities in WIB

JakartaSurabayaBandungMedanPalembang

Key Facts about WIB

•Indonesia spans three time zones: WIB (UTC+07:00), WITA (UTC+08:00) and WIT (UTC+09:00).
•Indonesia has not observed daylight saving time since 1964.
•Jakarta is the largest city in Southeast Asia by population.
•WIB shares the UTC+07:00 offset with Indochina Time.

Daylight Saving:No – UTC+07:00 year-round

Learn more about WIB on Wikipedia

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

Comparing Time Zones: Indonesia and China

Indonesia runs on Western Indonesia Time (WIB) at UTC+07:00. China runs on China Standard Time (CST) at UTC+08:00. That puts Indonesia 1 hour ahead of China — a difference of +1h at the current offsets.

In practice, when it is 9:00 AM in Indonesia it is 10:00 AM in China. Midnight in Indonesia is 1:00 AM in China. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Indonesia to China time conversion table

Indonesia (WIB)	China (CST)	Day
12:00 AM	1:00 AM	same day
6:00 AM	7:00 AM	same day
7:00 AM	8:00 AM	same day
8:00 AM	9:00 AM	same day
9:00 AM	10:00 AM	same day
12:00 PM	1:00 PM	same day
3:00 PM	4:00 PM	same day
5:00 PM	6:00 PM	same day
6:00 PM	7:00 PM	same day
9:00 PM	10:00 PM	same day

Why people convert Indonesia to China time

Scheduling a call from Indonesia to China: a 10:00 AM start in Indonesia lands at 11:00 AM in China, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Indonesia and China are inside the 9-to-5 working day between 9:00 AM and 4:00 PM WIB time (10:00 AM–5:00 PM CST). That is roughly 7 hours of usable overlap.
Watching a live event or market open: Indonesia viewers need 10:00 AM in China to catch a 9:00 AM start there, and 11:00 PM if the event is anchored to Indonesia.

Always state the zone abbreviation, not just the hour. "3:00 PM WIB" is unambiguous; "3 PM" across a +1h gap is not.
Block 9:00 AM–4:00 PM WIB as the recurring meeting window if you work primarily from Indonesia and need China colleagues present.

About WIB (Western Indonesia Time)

Western Indonesia Time (WIB, Waktu Indonesia Barat) is one of Indonesia's three time zones, fixed at UTC+07:00 all year. It covers Java, Sumatra, West Kalimantan and the provinces around them — home to Jakarta, the country's capital and largest city, plus Surabaya and Bandung. Indonesia does not observe daylight saving time, so WIB never shifts. WIB shares its UTC+07:00 offset with Indochina Time (ICT) and Christmas Island Time, but is a distinct zone covering the western half of the Indonesian archipelago. The country's other zones are WITA (UTC+08:00) in the centre and WIT (UTC+09:00) in the east.

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.

Best time to call between Indonesia and China

Both Indonesia and China sit inside the 9 AM – 5 PM working day between 9:00 AM–4:00 PM WIB, which is 10:00 AM–5:00 PM CST. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

Indonesia and China share 7 hours of working-hours overlap (9:00 AM–4:00 PM WIB), so scheduling a live meeting is straightforward.

Indonesia is 1 hour ahead of China (WIB UTC+07:00 → CST UTC+08:00). The shared working window is 9:00 AM–4:00 PM WIB. 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 Indonesia and China?

Indonesia (WIB, UTC+07:00) is 1 hour ahead of China (CST, UTC+08:00). The gap is currently +1h.

How do I convert Indonesia time to China time?

Add +1h to Indonesia local time. For example, 9:00 AM in Indonesia is 10:00 AM in China.

What time is it in China right now?

China uses CST at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +1h offset from Indonesia.