IST to Old Windsor Time Converter
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Quick answers
Selected conversion
5:30 pm17:30 IST (UTC+5:30), Nov 2, 2026 = 12:00 pm12:00 GMT (UTC+0), Nov 2, 2026
IST is 5 hours and 30 minutes ahead of Old Windsor.
How the time difference changes
For most of the year, IST is 4 hours and 30 minutes ahead of Old Windsor. From Oct 25, 2026 to Mar 28, 2027, and from Oct 31, 2027 to Mar 26, 2028, IST is 5 hours and 30 minutes ahead of Old Windsor.
For most of the year, working hours of 9:00 am to 6:00 pm in IST correspond to 4:30 am to 1:30 pm in Old Windsor. At other times of the year, working hours of 9:00 am to 6:00 pm in IST correspond to 3:30 am to 12:30 pm in Old Windsor.For most of the year, working hours of 09:00 to 18:00 in IST correspond to 04:30 to 13:30 in Old Windsor. At other times of the year, working hours of 09:00 to 18:00 in IST correspond to 03:30 to 12:30 in Old Windsor.
Compare IST time with Old Windsor time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
India Standard Time is 5 hours and 30 minutes ahead of GMT (Greenwich Mean Time).
5:30 pm17:30 in IST is 12:00 pm12:00 in Old Windsor, United Kingdom
IST to Old Windsor call time
Best time for a conference call or a meeting is between 2:30pm-6pm14:30-18:00 in IST which corresponds to 9am-12:30pm09:00-12:30 in Old Windsor
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
12:00 pm12:00 GMT (Greenwich Mean Time) (Old Windsor, United Kingdom). Offset UTC 0:00 hours
5:30 pm17:30 IST / 12:00 pm12:00 Old Windsor, United Kingdom
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| IST | Old Windsor, United Kingdom |
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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
- +0530 - basic
- +05:30 - extended
- +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.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2
Old Windsor Time Zone and Facts
Time Zone
BST – British Summer Time, UTC+1 (daylight saving time)