WIB to AKST
-16hWIB
WIBSOURCEAKST
AKSTGreen rows indicate typical business hours (9 AM - 5 PM)
WIB and AKST on the World Map
The map below highlights the WIB (Western Indonesia Time) and AKST (Alaska Standard 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.
AKST – Alaska Standard Time
UTC-09:00Alaska Standard Time (AKST) is the time zone for the state of Alaska, 9 hours behind UTC.
- •Alaska is the largest US state by area but has only about 730,000 residents.
- •Anchorage is the most populous city in AKST with about 290,000 people.
- •The Aleutian Islands use HAST instead of AKST.
WIB to AKST Time Difference – Complete Guide
WIB runs on Western Indonesia Time (WIB) at UTC+07:00. AKST runs on Alaska Standard Time (AKST) at UTC-09:00. That puts WIB 16 hours behind AKST — a difference of -16h at the current offsets.
In practice, when it is 9:00 AM in WIB it is 5:00 PM in AKST on the previous day. Midnight in WIB is 8:00 AM in AKST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
WIB to AKST time conversion table
| WIB (WIB) | AKST (AKST) | Day |
|---|---|---|
| 12:00 AM | 8:00 AM | previous day |
| 6:00 AM | 2:00 PM | previous day |
| 7:00 AM | 3:00 PM | previous day |
| 8:00 AM | 4:00 PM | previous day |
| 9:00 AM | 5:00 PM | previous day |
| 12:00 PM | 8:00 PM | previous day |
| 3:00 PM | 11:00 PM | previous day |
| 5:00 PM | 1:00 AM | same day |
| 6:00 PM | 2:00 AM | same day |
| 9:00 PM | 5:00 AM | same day |
Why people convert WIB to AKST time
- Scheduling a call from WIB to AKST: a 10:00 AM start in WIB lands at 6:00 PM in AKST the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -16h gap: WIB and AKST 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 AKST is 5:00 PM in WIB.
- Watching a live event or market open: WIB viewers need 5:00 PM in AKST to catch a 9:00 AM start there, and 4:00 PM if the event is anchored to WIB.
- Always state the zone abbreviation, not just the hour. "3:00 PM WIB" is unambiguous; "3 PM" across a -16h gap is not.
- With a -16h gap there is no shared 9-to-5 window, so alternate the early start: one week WIB takes the early slot, the next week AKST 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 AKST (Alaska Standard Time)
Alaska Standard Time (AKST) is used in nearly all of Alaska. Due to Alaska's vast geographic size, the Aleutian Islands use Hawaii-Aleutian Standard Time instead. During summer months, Alaska switches to Alaska Daylight Time (AKDT, UTC-08:00).
Best time to call between WIB and AKST
With a -16h offset there is no overlap inside a normal 9 AM – 5 PM day. AKST opens at 9:00 AM AKST, which is 5:00 PM in WIB, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
WIB and AKST have no shared working hours because of the -16h gap. Teams need to alternate early starts or rely on asynchronous handovers.
WIB is 16 hours behind AKST (WIB UTC+07:00 → AKST UTC-09:00). 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
WIB
Does not observe DST
AKST
☀ Currently in DST
Standard: UTC-09:00 · DST: UTC-08:00
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:
Frequently Asked Questions
What is the time difference between WIB and AKST?
WIB (WIB, UTC+07:00) is 16 hours behind AKST (AKST, UTC-09:00). The gap is currently -16h.
How do I convert WIB time to AKST time?
Add -16h to WIB local time. For example, 9:00 AM in WIB is 5:00 PM in AKST (previous day).
What time is it in AKST right now?
AKST uses AKST at UTC-09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -16h offset from WIB.
What is the best time to call AKST from WIB?
There is no shared working-hours window because of the -16h gap. The closest option is 1:00 PM in WIB, which is 9:00 PM in AKST.
Which is behind, WIB or AKST?
WIB is 16 hours behind AKST. When it is 12:00 PM in WIB it is 8:00 PM in AKST.
Does daylight saving time affect the WIB–AKST difference?
Neither zone observes daylight saving time, so the -16h offset between WIB and AKST is fixed all year.
Which other cities share WIB's time zone?
WIB also covers Jakarta, Surabaya, Bandung, Medan, Palembang.
Which countries use WIB, WIB's zone?
WIB is used in Indonesia (Java, Sumatra, West Kalimantan).
Is there a day difference between WIB and AKST?
Sometimes. The -16h gap is large enough that 8:00 PM or later in WIB already falls on the in AKST.
What is the time difference between WIB and AKST?
AKST is -16h from WIB.
What timezone is WIB in?
WIB operates on its local timezone.
What timezone is AKST in?
AKST 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 AKST timezone?
Major cities in the AKST timezone include Anchorage, Fairbanks, Juneau, Sitka, Wasilla.
What is the UTC offset for AKST?
Alaska Standard Time (AKST) is at UTC-09:00. During daylight saving time, it shifts to AKDT.
What should I know about the AKST timezone?
Alaska is the largest US state by area but has only about 730,000 residents. Anchorage is the most populous city in AKST with about 290,000 people.
When is it midnight in WIB, what time is it in AKST?
When it is 12:00 AM (midnight) in WIB (WIB), it is -16h later in AKST (AKST).
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