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Jakarta to MDT

-13h

Jakarta

WIBSOURCE
Indonesia · UTC+07:00
HH12
:
MM00
  
12:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM

MDT

MDT
UTC-06:00☀ DST active
HH11
:
MM00
  
(previous day)23:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM
Jakarta
MDT
12:00 AM
11:00 AM-1
2:00 AM
1:00 PM-1
4:00 AM
3:00 PM-1
6:00 AM
5:00 PM-1
8:00 AM
7:00 PM-1
10:00 AM
9:00 PM-1
12:00 PM
11:00 PM-1
2:00 PM
1:00 AM
4:00 PM
3:00 AM
6:00 PM
5:00 AM
8:00 PM
7:00 AM
10:00 PM
9:00 AM

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

WIB and MDT on the World Map

The map below highlights the WIB (Western Indonesia Time) and MDT (Mountain Daylight Time) timezone regions across the globe.

WIBMDTJakartaSurabayaBandungMedanDenverCalgaryEdmontonSalt Lake City
WIB Zone
→
MDT 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

MDT – Mountain Daylight Time

UTC-06:00

Mountain Daylight Time (MDT) is the daylight saving offset in the Mountain Time Zone, 6 hours behind UTC.

Countries in MDT
United States (Mountain)Canada (Alberta)
Major Cities in MDT
DenverCalgaryEdmontonSalt Lake CityBoise
Key Facts about MDT
  • •MDT shares the same offset as CST (UTC-06:00).
  • •Arizona does not switch to MDT, remaining on MST.
Daylight Saving:Yes – switches to MST
Learn more about MDT on Wikipedia

About Jakarta

Wikipedia

Jakarta operates on Western Indonesia Time (WIB), UTC+7. As Southeast Asia's largest economy, Jakarta's IDX is a key emerging market exchange.

Population:10.5 million
Metro:34.5 million
Business Hours:8:00 AM - 5:00 PM WIB
Currency:IDR (Rp)
Stock Exchange:IDX (Indonesia Stock Exchange)
Key Landmarks
MonasIstiqlal MosqueOld Town (Kota Tua)Taman MiniAncol Dreamland
Did You Know?

Indonesia has 3 time zones; Jakarta uses Western Indonesia Time (WIB).

Learn more about WIB timezone →

Everything You Need to Know About Jakarta and MDT Time

Jakarta runs on Western Indonesia Time (WIB) at UTC+07:00. MDT runs on Mountain Daylight Time (MDT) at UTC-06:00. That puts Jakarta 13 hours behind MDT — a difference of -13h at the current offsets.

In practice, when it is 9:00 AM in Jakarta it is 8:00 PM in MDT on the previous day. Midnight in Jakarta is 11:00 AM in MDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Jakarta to MDT time conversion table

Jakarta (WIB)MDT (MDT)Day
12:00 AM11:00 AMprevious day
6:00 AM5:00 PMprevious day
7:00 AM6:00 PMprevious day
8:00 AM7:00 PMprevious day
9:00 AM8:00 PMprevious day
12:00 PM11:00 PMprevious day
3:00 PM2:00 AMsame day
5:00 PM4:00 AMsame day
6:00 PM5:00 AMsame day
9:00 PM8:00 AMsame day

Why people convert Jakarta to MDT time

  • Scheduling a call from Jakarta to MDT: a 10:00 AM start in Jakarta lands at 9:00 PM in MDT the previous day, so you can confirm the slot without doing the arithmetic yourself.
  • Handling a -13h gap: Jakarta and MDT have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in MDT is 8:00 PM in Jakarta.
  • Coordinating a Jakarta-based team with MDT contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
  • Always state the zone abbreviation, not just the hour. "3:00 PM WIB" is unambiguous; "3 PM" across a -13h gap is not.
  • With a -13h gap there is no shared 9-to-5 window, so alternate the early start: one week Jakarta takes the early slot, the next week MDT does.

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 MDT (Mountain Daylight Time)

Mountain Daylight Time (MDT) is observed during summer months in the Mountain Time Zone, except in Arizona which stays on MST year-round. MDT aligns with Central Standard Time (CST) at UTC-06:00.

Best time to call between Jakarta and MDT

With a -13h offset there is no overlap inside a normal 9 AM – 5 PM day. MDT opens at 9:00 AM MDT, which is 8:00 PM in Jakarta, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Jakarta and MDT have no shared working hours because of the -13h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Jakarta is 13 hours behind MDT (WIB UTC+07:00 → MDT UTC-06:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Jakarta

Does not observe DST

MDT

☀ Currently in DST

Standard: UTC-07:00 · DST: UTC-06:00

Clocks fall back on Sun, Nov 1, 2026

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 Jakarta and MDT?

Jakarta (WIB, UTC+07:00) is 13 hours behind MDT (MDT, UTC-06:00). The gap is currently -13h.

How do I convert Jakarta time to MDT time?

Add -13h to Jakarta local time. For example, 9:00 AM in Jakarta is 8:00 PM in MDT (previous day).

What time is it in MDT right now?

MDT uses MDT at UTC-06:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -13h offset from Jakarta.

What is the best time to call MDT from Jakarta?

There is no shared working-hours window because of the -13h gap. The closest option is 1:00 PM in Jakarta, which is 12:00 AM in MDT.

Which is behind, Jakarta or MDT?

Jakarta is 13 hours behind MDT. When it is 12:00 PM in Jakarta it is 11:00 PM in MDT.

Do Jakarta and MDT use different time zones?

Jakarta (Indonesia) uses WIB at UTC+07:00, while MDT uses MDT at UTC-06:00. The IANA identifiers are Asia/Jakarta and America/Denver.

Does daylight saving time affect the Jakarta–MDT difference?

Neither zone observes daylight saving time, so the -13h offset between Jakarta and MDT is fixed all year.

Which other cities share Jakarta's time zone?

WIB also covers Jakarta, Surabaya, Bandung, Medan, Palembang.

Which countries use WIB, Jakarta's zone?

WIB is used in Indonesia (Java, Sumatra, West Kalimantan).

Is there a day difference between Jakarta and MDT?

Sometimes. The -13h gap is large enough that 8:00 PM or later in Jakarta already falls on the in MDT.

What is the time difference between Jakarta and MDT?

MDT is -13h from Jakarta.

What timezone is Jakarta in?

Jakarta operates on Western Indonesia Time (WIB), UTC+7. As Southeast Asia's largest economy, Jakarta's IDX is a key emerging market exchange.

What timezone is MDT in?

MDT operates on its local timezone.

What are the business hours in Jakarta?

Standard business hours in Jakarta are 8:00 AM - 5:00 PM WIB.

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 MDT timezone?

Major cities in the MDT timezone include Denver, Calgary, Edmonton, Salt Lake City, Boise.

What is the UTC offset for MDT?

Mountain Daylight Time (MDT) is at UTC-06:00. During daylight saving time, it shifts to MST.

What should I know about the MDT timezone?

MDT shares the same offset as CST (UTC-06:00). Arizona does not switch to MDT, remaining on MST.

When is it midnight in Jakarta, what time is it in MDT?

When it is 12:00 AM (midnight) in Jakarta (WIB), it is -13h later in MDT (MDT).

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jakarta→wibjakarta→indonesiajakarta→new yorkjakarta→londonmdt→denvermdt→mstmdt→new yorkmdt→london

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