IST
Time Difference
Irish Standard Time is 4 hours and 30 minutes behind India Standard Time
12:30 pm12:30 in IST is 5:00 pm17:00 in IST
IST to IST call time
Best time for a conference call or a meeting is between 8am-1:30pm in IST which corresponds to 12:30pm-6pm in IST
12:30 pm12:30 Irish Standard Time (IST). Offset UTC +1:00 hour
5:00 pm17:00 India Standard Time (IST). Offset UTC +5:30 hours
12:30 pm12:30 IST / 5:00 pm17:00 IST
| IST | IST |
|---|---|
| 12am (midnight) | 4:30 am |
| 1am | 5:30 am |
| 2am | 6:30 am |
| 3am | 7:30 am |
| 4am | 8:30 am |
| 5am | 9:30 am |
| 6am | 10:30 am |
| 7am | 11:30 am |
| 8am | 12:30 pm |
| 9am | 1:30 pm |
| 10am | 2:30 pm |
| 11am | 3:30 pm |
| 12pm (noon) | 4:30 pm |
| 1pm | 5:30 pm |
| 2pm | 6:30 pm |
| 3pm | 7:30 pm |
| 4pm | 8:30 pm |
| 5pm | 9:30 pm |
| 6pm | 10:30 pm |
| 7pm | 11:30 pm |
| 8pm | 12:30 am |
| 9pm | 1:30 am |
| 10pm | 2:30 am |
| 11pm | 3:30 am |
| 0:00 | 4:30 |
| 1:00 | 5:30 |
| 2:00 | 6:30 |
| 3:00 | 7:30 |
| 4:00 | 8:30 |
| 5:00 | 9:30 |
| 6:00 | 10:30 |
| 7:00 | 11:30 |
| 8:00 | 12:30 |
| 9:00 | 13:30 |
| 10:00 | 14:30 |
| 11:00 | 15:30 |
| 12:00 | 16:30 |
| 13:00 | 17:30 |
| 14:00 | 18:30 |
| 15:00 | 19:30 |
| 16:00 | 20:30 |
| 17:00 | 21:30 |
| 18:00 | 22:30 |
| 19:00 | 23:30 |
| 20:00 | 0:30 |
| 21:00 | 1:30 |
| 22:00 | 2:30 |
| 23:00 | 3:30 |
Irish Standard Time
Offset: IST is 1 hour ahead Greenwich Mean Time (GMT) and is used in Europe
Countries: It is used in following countries: Ireland
Principal Cities: The largest city in the IST timezone is Dublin from Ireland with population about 1.024 million people. Other major cities in the area are Cork, Dun Laoghaire, Luimneach, Gaillimh
Daylight Saving: This is a standard timezone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Greenwich Mean Time (GMT).
Start: Irish Standard Time (IST) started on Sunday, March 31, 2024 at 3:00 am local time and clocks were set one hour back to Sunday, March 31, 2024, 2:00 am. Standard time starts annually the on last Sunday of March.
End: Irish Standard Time (IST) ends on Sunday, October 27, 2024 at 2:00 am local time and clocks are set one hour forward to Sunday, October 27, 2024, 3:00 am local daylight time instead. Standard time starts annually the on last Sunday of October.
IST representations, usage and related time zones
W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
- +01 - basic short
- +0100 - basic
- +01:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
- +0100 - sign character (+) followed by a four digit time providing hours (01) and minutes (00) of the offset. Indicates one hour and zero minutes time differences to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
- Alpha - Military abbreviation for IST
- A - short form of 'Alpha'
IANA/Olson: Reflects IST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
- Eire
- Europe/Dublin
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
- Iran Standard Time - UTC +3:30
Time zones with the GMT +1 offset:
- BST - British Summer Time
- CET - Central European Time
- IST - Irish Standard Time
- WEST - Western European Summer Time
- A - Alpha Time Zone
- CET - Central European Time
- MEZ - Mitteleuropäische Zeit
- WAT - West Africa Time
- WST - Western Sahara Summer Time
- BMT - Biel Mean Time
India Standard Time
Offset: IST is 5 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia
Countries: It is used in following countries: India
Principal Cities: The largest city in the IST timezone is Mumbai from India with population about 12.692 million people. Other major cities in the area are Delhi, Bangalore, Kolkata, Chennai
Daylight Saving: India Standard Time (IST) is not adjusted for daylight saving therefore IST remains the same through out the year. This means, unlike some time zones where the clock is set forward by one hour every summer and backward by one hour during winter to adjust for daylight saving, India Standard Time remains the same
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 five hour and thirty minutes time differences 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
- Iran Standard Time - UTC +3:30
