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IST
EDT/EST
Eastern Daylight Time
GMT -4
EST automatically adjusted to EDT time zone, that is in use
EDT/EST
Eastern Daylight Time
GMT -4
EST automatically adjusted to EDT time zone, that is in use
Time Difference
Irish Standard Time is 5 hours ahead of Eastern Daylight Time and 5 hours ahead of Eastern Daylight Time
9:00 pm21:00 in IST is 4:00 pm16:00 in EDT and is 4:00 pm16:00 in EDT
IST to EST call time
Best time for a conference call or a meeting is between 2pm-6pm in IST which corresponds to 8am-12pm in EST
IST to EST call time
Best time for a conference call or a meeting is between 2pm-6pm in IST which corresponds to 8am-12pm in EST
9:00 pm21:00 Irish Standard Time (IST). Offset UTC +1:00 hour
4:00 pm16:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
4:00 pm16:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
9:00 pm21:00 IST / 4:00 pm16:00 EDT / 4:00 pm16:00 EDT
| IST | EDT | EDT |
|---|---|---|
| 12am (midnight) | 7pm | 7pm |
| 1am | 8pm | 8pm |
| 2am | 9pm | 9pm |
| 3am | 10pm | 10pm |
| 4am | 11pm | 11pm |
| 5am | 12am (midnight) | 12am (midnight) |
| 6am | 1am | 1am |
| 7am | 2am | 2am |
| 8am | 3am | 3am |
| 9am | 4am | 4am |
| 10am | 5am | 5am |
| 11am | 6am | 6am |
| 12pm (noon) | 7am | 7am |
| 1pm | 8am | 8am |
| 2pm | 9am | 9am |
| 3pm | 10am | 10am |
| 4pm | 11am | 11am |
| 5pm | 12pm (noon) | 12pm (noon) |
| 6pm | 1pm | 1pm |
| 7pm | 2pm | 2pm |
| 8pm | 3pm | 3pm |
| 9pm | 4pm | 4pm |
| 10pm | 5pm | 5pm |
| 11pm | 6pm | 6pm |
| 0:00 | 19:00 | 19:00 |
| 1:00 | 20:00 | 20:00 |
| 2:00 | 21:00 | 21:00 |
| 3:00 | 22:00 | 22:00 |
| 4:00 | 23:00 | 23:00 |
| 5:00 | 0:00 | 0:00 |
| 6:00 | 1:00 | 1:00 |
| 7:00 | 2:00 | 2:00 |
| 8:00 | 3:00 | 3:00 |
| 9:00 | 4:00 | 4:00 |
| 10:00 | 5:00 | 5:00 |
| 11:00 | 6:00 | 6:00 |
| 12:00 | 7:00 | 7:00 |
| 13:00 | 8:00 | 8:00 |
| 14:00 | 9:00 | 9:00 |
| 15:00 | 10:00 | 10:00 |
| 16:00 | 11:00 | 11:00 |
| 17:00 | 12:00 | 12:00 |
| 18:00 | 13:00 | 13:00 |
| 19:00 | 14:00 | 14:00 |
| 20:00 | 15:00 | 15:00 |
| 21:00 | 16:00 | 16:00 |
| 22:00 | 17:00 | 17:00 |
| 23:00 | 18:00 | 18:00 |
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
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
Eastern Standard Time
Offset: EST is 5 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries: It is used in following countries: Bahamas, Canada, Haiti, Jamaica, Cayman Islands, Mexico, Panama, Turks & Caicos Is, United States
Principal Cities: The largest city in the EST timezone is New York City from USA with population about 8.175 million people. Other major cities in the area are Toronto, Montreal, Brooklyn, Borough of Queens
French: HNE - Heure Normale de l'Est
Spanish: ET - Tiempo del Este, ET - Zona Sureste
Daylight Saving: This is a standard time zone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Eastern Daylight Time (EDT).
End: Eastern Standard Time (EST) has ended on Sunday, March 10, 2024 at 2:00 am local time and clocks were set one hour forward to Sunday, March 10, 2024, 3:00 am local daylight time instead. Standard time ends annually the on second Sunday of March.
Start: Eastern Standard Time (EST) starts on Sunday, November 3, 2024 at 2:00 am local time and clocks are set one hour back to Sunday, November 3, 2024, 1:00 am. Standard time starts annually the on first Sunday of November.
EST representations, usage and related time zones
W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
- -05 - basic short
- -0500 - basic
- -05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
- -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates five hour and zero minutes time differences to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
- Romeo - Military abbreviation for EST
- R - short form of 'Romeo'
IANA/Olson: Reflects EST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
- America/Atikokan
- America/Cancun
- America/Cayman
- America/Coral_Harbour
- America/Detroit
- America/Fort_Wayne
- America/Grand_Turk
- America/Indiana/Indianapolis
- America/Indiana/Marengo
- America/Indiana/Petersburg
- America/Indiana/Vevay
- America/Indiana/Vincennes
- America/Indiana/Winamac
- America/Indianapolis
- America/Iqaluit
- America/Jamaica
- America/Kentucky/Louisville
- America/Kentucky/Monticello
- America/Louisville
- America/Montreal
- America/Nassau
- America/New_York
- America/Nipigon
- America/Panama
- America/Pangnirtung
- America/Port-au-Prince
- America/Thunder_Bay
- America/Toronto
- Canada/Eastern
- EST
- EST5EDT
- Jamaica
- US/East-Indiana
- US/Eastern
- US/Michigan
Time zones with the GMT -5 offset:
- CDT - Central Daylight Time
- EST - Eastern Standard Time
- ET - Eastern Time
- COT - Colombia Time
- CST - Cuba Standard Time
- EASST - Easter Island Summer Time
- ECT - Ecuador Time
- PET - Peru Time
- R - Romeo Time Zone
Eastern Standard Time
Offset: EST is 5 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries: It is used in following countries: Bahamas, Canada, Haiti, Jamaica, Cayman Islands, Mexico, Panama, Turks & Caicos Is, United States
Principal Cities: The largest city in the EST timezone is New York City from USA with population about 8.175 million people. Other major cities in the area are Toronto, Montreal, Brooklyn, Borough of Queens
French: HNE - Heure Normale de l'Est
Spanish: ET - Tiempo del Este, ET - Zona Sureste
Daylight Saving: This is a standard time zone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Eastern Daylight Time (EDT).
End: Eastern Standard Time (EST) has ended on Sunday, March 10, 2024 at 2:00 am local time and clocks were set one hour forward to Sunday, March 10, 2024, 3:00 am local daylight time instead. Standard time ends annually the on second Sunday of March.
Start: Eastern Standard Time (EST) starts on Sunday, November 3, 2024 at 2:00 am local time and clocks are set one hour back to Sunday, November 3, 2024, 1:00 am. Standard time starts annually the on first Sunday of November.
EST representations, usage and related time zones
W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
- -05 - basic short
- -0500 - basic
- -05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
- -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates five hour and zero minutes time differences to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
- Romeo - Military abbreviation for EST
- R - short form of 'Romeo'
IANA/Olson: Reflects EST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
- America/Atikokan
- America/Cancun
- America/Cayman
- America/Coral_Harbour
- America/Detroit
- America/Fort_Wayne
- America/Grand_Turk
- America/Indiana/Indianapolis
- America/Indiana/Marengo
- America/Indiana/Petersburg
- America/Indiana/Vevay
- America/Indiana/Vincennes
- America/Indiana/Winamac
- America/Indianapolis
- America/Iqaluit
- America/Jamaica
- America/Kentucky/Louisville
- America/Kentucky/Monticello
- America/Louisville
- America/Montreal
- America/Nassau
- America/New_York
- America/Nipigon
- America/Panama
- America/Pangnirtung
- America/Port-au-Prince
- America/Thunder_Bay
- America/Toronto
- Canada/Eastern
- EST
- EST5EDT
- Jamaica
- US/East-Indiana
- US/Eastern
- US/Michigan
Time zones with the GMT -5 offset:
- CDT - Central Daylight Time
- EST - Eastern Standard Time
- ET - Eastern Time
- COT - Colombia Time
- CST - Cuba Standard Time
- EASST - Easter Island Summer Time
- ECT - Ecuador Time
- PET - Peru Time
- R - Romeo Time Zone
EST to IST GMT to EST PST to EST EST to GMT PST to GMT
