Updating current time…
IST
12am
3am
6am
9am
12pm
3pm
6pm
9pm
WIB
UTC+7
1h 30m ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

5:30 pm17:30 IST (UTC+5:30), Oct 18, 2026 = 7:00 pm19:00 WIB (UTC+7), Oct 18, 2026

IST is 1 hour and 30 minutes behind WIB.

IST and WIB examples

These examples always use IST (UTC+5:30) and WIB (UTC+7). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

IST is 1 hour and 30 minutes behind WIB.

How the time difference changes

IST is 1 hour and 30 minutes behind WIB year-round.

Working hours of 9:00 am to 6:00 pm in IST correspond to 10:30 am to 7:30 pm in WIB.Working hours of 09:00 to 18:00 in IST correspond to 10:30 to 19:30 in WIB.

Compare IST time with WIB time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

India Standard Time is 1 hour and 30 minutes behind Western Indonesian Time.
5:30 pm17:30 in IST is 7:00 pm19:00 in WIB

IST to WIB call time
Best time for a conference call or a meeting is between 9am-4:30pm09:00-16:30 in IST which corresponds to 10:30am-6pm10:30-18:00 in WIB

5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
7:00 pm19:00 Western Indonesian Time (WIB). Offset UTC +7:00 hours

5:30 pm17:30 IST / 7:00 pm19:00 WIB

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Hourly time comparison
ISTWIB
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12:30am next day
01:30
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00:30 next day

India Standard Time

Offset: IST is 5 hours and 30 minutes ahead of Greenwich Mean Time (GMT).

Countries using this time zone: India

Principal Cities: The largest city in the IST time zone is Mumbai in India, with about 12.692 million people. Other major cities in this time zone include Delhi, Bengaluru, Hyderabad, Ahmedabad.

Daylight Saving: Clocks in India Standard Time (IST) do not change for daylight saving time, so IST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

Current time in India: India time now

IST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +0530 - basic
  • +05:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates an offset of five hours and thirty minutes to the east of the zero meridian.
IANA/Olson: Reflects IST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Calcutta
  • Asia/Kolkata
IST Abbreviation: Several time zones share IST abbreviation and it could refer to these time zones
  • India Standard Time - UTC +5:30
  • Irish Standard Time - UTC +1
  • Israel Standard Time - UTC +2

Western Indonesian Time

Offset: WIB is 7 hours ahead of Greenwich Mean Time (GMT).

Countries using this time zone: Indonesia

Principal Cities: The largest city in the WIB time zone is Jakarta in Indonesia, with about 8.54 million people. Other major cities in this time zone include Surabaya, Bekasi, Bandung, Medan.

Daylight Saving: Clocks in Western Indonesian Time (WIB) do not change for daylight saving time, so WIB stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

WIB representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +07 - basic short
  • +0700 - basic
  • +07:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0700 - sign character (+) followed by a four digit time providing hours (07) and minutes (00) of the offset. Indicates an offset of seven hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Golf - Military abbreviation for WIB
  • G - short form of 'Golf'
IANA/Olson: Reflects WIB time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Jakarta
  • Asia/Pontianak
Time zones with the GMT +7 offset:
  • CXT - Christmas Island Time
  • DAVT - Davis Time
  • G - Golf Time Zone
  • HOVT - Hovd Time
  • ICT - Indochina Time
  • KRAT - Krasnoyarsk Time
  • NOVST - Novosibirsk Summer Time
  • NOVT - Novosibirsk Time
  • OMSST - Omsk Summer Time
  • WIB - Western Indonesian Time