Indonesia to CAT
-5hIndonesia
WIBSOURCECAT
CATGreen rows indicate typical business hours (9 AM - 5 PM)
WIB and CAT on the World Map
The map below highlights the WIB (Western Indonesia Time) and CAT (Central Africa Time) timezone regions across the globe.
WIB – Western Indonesia Time
UTC+07:00Western Indonesia Time (WIB, UTC+07:00) covers Java, Sumatra and West Kalimantan, including Jakarta.
- •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.
CAT – Central Africa Time
UTC+02:00Central Africa Time (CAT, UTC+02:00) covers Zimbabwe, Zambia, Mozambique, Malawi and neighbouring countries.
- •Central Africa Time is fixed at UTC+02:00 with no daylight saving.
- •CAT matches South Africa Standard Time (SAST) all year.
- •It is the same offset as Central European Time in winter.
- •Harare is level with Johannesburg and one hour ahead of Lagos.
Understanding the -5h Gap: Indonesia vs CAT
Indonesia runs on Western Indonesia Time (WIB) at UTC+07:00. CAT runs on Central Africa Time (CAT) at UTC+02:00. That puts Indonesia 5 hours behind CAT — a difference of -5h at the current offsets.
In practice, when it is 9:00 AM in Indonesia it is 4:00 AM in CAT. Midnight in Indonesia is 7:00 PM in CAT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Indonesia to CAT time conversion table
| Indonesia (WIB) | CAT (CAT) | Day |
|---|---|---|
| 12:00 AM | 7:00 PM | previous day |
| 6:00 AM | 1:00 AM | same day |
| 7:00 AM | 2:00 AM | same day |
| 8:00 AM | 3:00 AM | same day |
| 9:00 AM | 4:00 AM | same day |
| 12:00 PM | 7:00 AM | same day |
| 3:00 PM | 10:00 AM | same day |
| 5:00 PM | 12:00 PM | same day |
| 6:00 PM | 1:00 PM | same day |
| 9:00 PM | 4:00 PM | same day |
Why people convert Indonesia to CAT time
- Scheduling a call from Indonesia to CAT: a 10:00 AM start in Indonesia lands at 5:00 AM in CAT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Indonesia and CAT are inside the 9-to-5 working day between 2:00 PM and 5:00 PM WIB time (9:00 AM–12:00 PM CAT). That is roughly 3 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Indonesia is 3:00 PM in CAT makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM WIB" is unambiguous; "3 PM" across a -5h gap is not.
- Block 2:00 PM–5:00 PM WIB as the recurring meeting window if you work primarily from Indonesia and need CAT 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 CAT (Central Africa Time)
Central Africa Time (CAT) is fixed at UTC+02:00 all year across a broad belt of southern and central Africa, including Zimbabwe, Zambia, Mozambique, Malawi, Rwanda, Burundi and the eastern Democratic Republic of the Congo. None of these countries observes daylight saving time, so CAT never shifts. It is the same offset as South Africa Standard Time (SAST) and the winter version of Central European Time, which makes CAT a convenient bridge between African, European and Middle Eastern schedules — Harare is level with Johannesburg all year and one hour ahead of Lagos.
Best time to call between Indonesia and CAT
Both Indonesia and CAT sit inside the 9 AM – 5 PM working day between 2:00 PM–5:00 PM WIB, which is 9:00 AM–12:00 PM CAT. That gives roughly 3 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Indonesia and CAT overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.
Indonesia is 5 hours behind CAT (WIB UTC+07:00 → CAT UTC+02:00). The shared working window is 2:00 PM–5:00 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:
Frequently Asked Questions
What is the time difference between Indonesia and CAT?
Indonesia (WIB, UTC+07:00) is 5 hours behind CAT (CAT, UTC+02:00). The gap is currently -5h.
How do I convert Indonesia time to CAT time?
Add -5h to Indonesia local time. For example, 9:00 AM in Indonesia is 4:00 AM in CAT.
What time is it in CAT right now?
CAT uses CAT at UTC+02:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -5h offset from Indonesia.
What is the best time to call CAT from Indonesia?
Call between 2:00 PM and 5:00 PM WIB — that maps to 9:00 AM–12:00 PM CAT and keeps both parties inside the working day.
Which is behind, Indonesia or CAT?
Indonesia is 5 hours behind CAT. When it is 12:00 PM in Indonesia it is 7:00 AM in CAT.
Do Indonesia and CAT use different time zones?
Indonesia (Indonesia) uses WIB at UTC+07:00, while CAT uses CAT at UTC+02:00. The IANA identifiers are Asia/Jakarta and Africa/Harare.
Does daylight saving time affect the Indonesia–CAT difference?
Neither zone observes daylight saving time, so the -5h offset between Indonesia and CAT is fixed all year.
Which other cities share Indonesia's time zone?
WIB also covers Jakarta, Surabaya, Bandung, Medan, Palembang.
Which countries use WIB, Indonesia's zone?
WIB is used in Indonesia (Java, Sumatra, West Kalimantan).
Is there a day difference between Indonesia and CAT?
Not normally. The -5h gap only pushes the date over the previous day.
What is the time difference between Indonesia and CAT?
CAT is -5h from Indonesia.
What timezone is Indonesia in?
Indonesia operates on its local timezone.
What timezone is CAT in?
CAT operates on its local timezone.
Which countries use WIB (Western Indonesia Time)?
WIB is used in Indonesia (Java, Sumatra, West Kalimantan).
Does WIB observe daylight saving time?
No, WIB does not observe daylight saving time and remains at UTC+07:00 year-round.
What are some interesting 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.
Which cities are in the CAT timezone?
Major cities in the CAT timezone include Harare, Lusaka, Maputo, Lilongwe, Kigali.
What is the UTC offset for CAT?
Central Africa Time (CAT) is at UTC+02:00.
What should I know about the CAT timezone?
Central Africa Time is fixed at UTC+02:00 with no daylight saving. CAT matches South Africa Standard Time (SAST) all year.
When is it midnight in Indonesia, what time is it in CAT?
When it is 12:00 AM (midnight) in Indonesia (WIB), it is -5h later in CAT (CAT).
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