IST
India Standard Time
GMT +5:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm
ChST
Chamorro Standard Time
GMT +10
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

IST is 4 hours and 30 minutes behind ChST. IST uses GMT +5:30, and ChST uses GMT +10 for this comparison.

For example, 5:30 pm IST is 10:00 pm ChST. Use the converter above to adjust the date or time and create a shareable meeting link.

Best meeting overlap: 9am-12:30pm IST, which is 1:30pm-5pm ChST.

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

Time Difference

India Standard Time is 4 hours and 30 minutes behind Chamorro Standard Time
5:30 pm17:30 in IST is 10:00 pm22:00 in ChST

IST to ChST call time
Best time for a conference call or a meeting is between 9am-12:30pm in IST which corresponds to 1:30pm-5pm in ChST

5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
10:00 pm22:00 Chamorro Standard Time (ChST). Offset UTC +10:00 hours

5:30 pm17:30 IST / 10:00 pm22:00 ChST

ISTChST
12am (midnight)4:30 am
1am5:30 am
2am6:30 am
3am7:30 am
4am8:30 am
5am9:30 am
6am10:30 am
7am11:30 am
8am12:30 pm
9am1:30 pm
10am2:30 pm
11am3:30 pm
12pm (noon)4:30 pm
1pm5:30 pm
2pm6:30 pm
3pm7:30 pm
4pm8:30 pm
5pm9:30 pm
6pm10:30 pm
7pm11:30 pm
8pm12:30 am
9pm1:30 am
10pm2:30 am
11pm3:30 am
00:0004:30
01:0005:30
02:0006:30
03:0007:30
04:0008:30
05:0009:30
06:0010:30
07:0011:30
08:0012:30
09:0013:30
10:0014:30
11:0015:30
12:0016:30
13:0017:30
14:0018:30
15:0019:30
16:0020:30
17:0021:30
18:0022:30
19:0023:30
20:0000:30
21:0001:30
22:0002:30
23:0003:30

India Standard Time

Offset: IST is 5 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia

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, Bangalore, Kolkata, Chennai.

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.

IST Time Zone Geo Map
IST timezone map

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

Chamorro Standard Time

Offset: ChST is 10 hours ahead Greenwich Mean Time (GMT) and is used in Pacific

Countries using this time zone: Guam, Northern Mariana Islands

Principal Cities: The largest city in the ChST time zone is Saipan in Northern Mariana Islands, with about 48,220 people. Other major cities in this time zone include Dededo Village, Yigo Village, Tamuning Tumon Harmon Village, Mangilao Village.

Daylight Saving: Clocks in Chamorro Standard Time (ChST) do not change for daylight saving time, so ChST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.

ChST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +10 - basic short
  • +1000 - basic
  • +10:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1000 - sign character (+) followed by a four digit time providing hours (10) and minutes (00) of the offset. Indicates an offset of ten hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Kilo - Military abbreviation for ChST
  • K - short form of 'Kilo'
IANA/Olson: Reflects ChST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Pacific/Guam
  • Pacific/Saipan
Time zones with the GMT +10 offset:
  • AEST - Australian Eastern Standard Time
  • CHUT - Chuuk Time
  • ChST - Chamorro Standard Time
  • K - Kilo Time Zone
  • KDT - Korea Daylight Time
  • PGT - Papua New Guinea Time
  • VLAT - Vladivostok Time
  • YAKST - Yakutsk Summer Time
  • YAPT - Yap Time