Z
Zulu Time Zone
GMT +0
12am
3am
6am
9am
12pm
3pm
6pm
9pm
IST
India Standard Time
GMT +5:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Z is 5 hours and 30 minutes behind IST. Z uses GMT +0, and IST uses GMT +5:30 for this comparison.

For example, 12:00 pm Z is 5:30 pm IST. Use the converter above to adjust the date or time and create a shareable meeting link.

Best meeting overlap: 9am-11:30am Z, which is 2:30pm-5pm IST.

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

Time Difference

Zulu Time Zone is 5 hours and 30 minutes behind India Standard Time
12:00 pm12:00 in Z is 5:30 pm17:30 in IST

Z to IST call time
Best time for a conference call or a meeting is between 9am-11:30am in Z which corresponds to 2:30pm-5pm in IST

12:00 pm12:00 Zulu Time Zone (Z). Offset UTC 0:00 hours
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours

12:00 pm12:00 Z / 5:30 pm17:30 IST

ZIST
12am (midnight)5:30 am
1am6:30 am
2am7:30 am
3am8:30 am
4am9:30 am
5am10:30 am
6am11:30 am
7am12:30 pm
8am1:30 pm
9am2:30 pm
10am3:30 pm
11am4:30 pm
12pm (noon)5:30 pm
1pm6:30 pm
2pm7:30 pm
3pm8:30 pm
4pm9:30 pm
5pm10:30 pm
6pm11:30 pm
7pm12:30 am
8pm1:30 am
9pm2:30 am
10pm3:30 am
11pm4:30 am
00:0005:30
01:0006:30
02:0007:30
03:0008:30
04:0009:30
05:0010:30
06:0011:30
07:0012:30
08:0013:30
09:0014:30
10:0015:30
11:0016:30
12:0017:30
13:0018:30
14:0019:30
15:0020:30
16:0021:30
17:0022:30
18:0023:30
19:0000:30
20:0001:30
21:0002:30
22:0003:30
23:0004:30

Zulu Time Zone

Offset: Z is 0 hours ahead Greenwich Mean Time (GMT) and is used in Military

Coordinated Universal Time (UTC) is the world time standard that regulates clocks and time. It is successor to Greenwich Mean Time (GMT). For casual use, UTC is the same as GMT, but is used by the scientific community.
UTC is the time standard commonly used across the world since 1972. It is used in many technical fields, like aviation industry and meteorologists, also used to synchronize time across internet networks.

Z representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
  • +00 - basic short
  • +0000 - basic
  • +00:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Zulu - Military abbreviation for Z
  • Z - short form of 'Zulu'
Time zones with the GMT +0 offset:
  • EGST - Eastern Greenland Summer Time
  • GMT - Greenwich Mean Time
  • WET - Western European Time
  • AZOST - Azores Summer Time
  • UTC - Universal Time Coordinated
  • WT - Western Sahara Standard Time
  • Z - Zulu Time Zone

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