Updating current time…

No shared working hoursThu, Oct 15

IST
12am
3am
6am
9am
12pm
3pm
6pm
9pm
GYT
UTC−4
9h 30m behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

5:30 pm17:30 IST (UTC+5:30), Oct 15, 2026 = 8:00 am08:00 GYT (UTC-4), Oct 15, 2026

IST is 9 hours and 30 minutes ahead of GYT.

IST and GYT examples

These examples always use IST (UTC+5:30) and GYT (UTC-4). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

IST is 9 hours and 30 minutes ahead of GYT.

How the time difference changes

IST is 9 hours and 30 minutes ahead of GYT year-round.

Working hours of 9:00 am to 6:00 pm in IST correspond to 11:30 pm (previous day) to 8:30 am in GYT.Working hours of 09:00 to 18:00 in IST correspond to 23:30 (previous day) to 08:30 in GYT.

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

Time Difference

India Standard Time is 9 hours and 30 minutes ahead of Guyana Time.
5:30 pm17:30 in IST is 8:00 am08:00 in GYT

IST to GYT call time
Best time for a conference call or a meeting is between 6pm-7pm18:00-19:00 in IST which corresponds to 8:30am-9:30am08:30-09:30 in GYT. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.

5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
8:00 am08:00 Guyana Time (GYT). Offset UTC -4:00 hours

5:30 pm17:30 IST / 8:00 am08:00 GYT

Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.

Hourly time comparison
ISTGYT
2:30pm previous day
3:30pm previous day
4:30pm previous day
5:30pm previous day
6:30pm previous day
7:30pm previous day
8:30pm previous day
9:30pm previous day
10:30pm previous day
11:30pm previous day
12:30am
1:30am
2:30am
3:30am
4:30am
5:30am
6:30am
7:30am
8:30am
9:30am
10:30am
11:30am
12:30pm
1:30pm
14:30 previous day
15:30 previous day
16:30 previous day
17:30 previous day
18:30 previous day
19:30 previous day
20:30 previous day
21:30 previous day
22:30 previous day
23:30 previous day
00:30
01:30
02:30
03:30
04:30
05:30
06:30
07:30
08:30
09:30
10:30
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12:30
13:30

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.

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

Guyana Time

Offset: GYT is 4 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Guyana

Principal Cities: The largest city in the GYT time zone is Georgetown in Guyana, with about 235,017 people. Other major cities in this time zone include Linden, New Amsterdam, Anna Regina, Corriverton.

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

GYT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -04 - basic short
  • -0400 - basic
  • -04:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0400 - sign character (-) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates an offset of four hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Quebec - Military abbreviation for GYT
  • Q - short form of 'Quebec'
Time zones with the GMT -4 offset:
  • AST - Atlantic Standard Time
  • EDT - Eastern Daylight Time
  • AMT - Amazon Time
  • BOT - Bolivia Time
  • CDT - Cuba Daylight Time
  • CLT - Chile Standard Time
  • FKT - Falkland Island Time
  • GYT - Guyana Time
  • HLV - Hora Legal de Venezuela
  • PYT - Paraguay Time
  • Q - Quebec Time Zone
  • VET - Venezuelan Standard Time