IST to UTC to CST to PT
Time Difference
India Standard Time is 5 hours and 30 minutes ahead of Universal Time Coordinated and 10 hours and 30 minutes ahead of Central Daylight Time and 12 hours and 30 minutes ahead of Pacific Daylight Time
8:00 am08:00 in IST is 2:30 am02:30 in UTC and is 9:30 pm21:30 in CDT and is 7:30 pm19:30 in PDT
IST to UTC call time
Best time for a conference call or a meeting is between 1:30pm-6pm in IST which corresponds to 8am-12:30pm in UTC
IST to CST call time
Best time for a conference call or a meeting is between 6:30pm-8:30pm in IST which corresponds to 7am-9am in CST
IST to PT call time
Best time for a conference call or a meeting is between 7:30pm-9:30pm in IST which corresponds to 6am-8am in PT
8:00 am08:00 India Standard Time (IST). Offset UTC +5:30 hours
2:30 am02:30 Universal Time Coordinated (UTC). Offset UTC 0:00 hours
9:30 pm21:30 Central Daylight Time (CDT). Offset UTC -5:00 hours
7:30 pm19:30 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
8:00 am08:00 IST / 2:30 am02:30 UTC / 9:30 pm21:30 CDT / 7:30 pm19:30 PDT
| IST | UTC | CDT | PT |
|---|---|---|---|
| 12am (midnight) | 6:30 pm | 1:30 pm | 11:30 am |
| 1am | 7:30 pm | 2:30 pm | 12:30 pm |
| 2am | 8:30 pm | 3:30 pm | 1:30 pm |
| 3am | 9:30 pm | 4:30 pm | 2:30 pm |
| 4am | 10:30 pm | 5:30 pm | 3:30 pm |
| 5am | 11:30 pm | 6:30 pm | 4:30 pm |
| 6am | 12:30 am | 7:30 pm | 5:30 pm |
| 7am | 1:30 am | 8:30 pm | 6:30 pm |
| 8am | 2:30 am | 9:30 pm | 7:30 pm |
| 9am | 3:30 am | 10:30 pm | 8:30 pm |
| 10am | 4:30 am | 11:30 pm | 9:30 pm |
| 11am | 5:30 am | 12:30 am | 10:30 pm |
| 12pm (noon) | 6:30 am | 1:30 am | 11:30 pm |
| 1pm | 7:30 am | 2:30 am | 12:30 am |
| 2pm | 8:30 am | 3:30 am | 1:30 am |
| 3pm | 9:30 am | 4:30 am | 2:30 am |
| 4pm | 10:30 am | 5:30 am | 3:30 am |
| 5pm | 11:30 am | 6:30 am | 4:30 am |
| 6pm | 12:30 pm | 7:30 am | 5:30 am |
| 7pm | 1:30 pm | 8:30 am | 6:30 am |
| 8pm | 2:30 pm | 9:30 am | 7:30 am |
| 9pm | 3:30 pm | 10:30 am | 8:30 am |
| 10pm | 4:30 pm | 11:30 am | 9:30 am |
| 11pm | 5:30 pm | 12:30 pm | 10:30 am |
| 0:00 | 18:30 | 13:30 | 11:30 |
| 1:00 | 19:30 | 14:30 | 12:30 |
| 2:00 | 20:30 | 15:30 | 13:30 |
| 3:00 | 21:30 | 16:30 | 14:30 |
| 4:00 | 22:30 | 17:30 | 15:30 |
| 5:00 | 23:30 | 18:30 | 16:30 |
| 6:00 | 0:30 | 19:30 | 17:30 |
| 7:00 | 1:30 | 20:30 | 18:30 |
| 8:00 | 2:30 | 21:30 | 19:30 |
| 9:00 | 3:30 | 22:30 | 20:30 |
| 10:00 | 4:30 | 23:30 | 21:30 |
| 11:00 | 5:30 | 0:30 | 22:30 |
| 12:00 | 6:30 | 1:30 | 23:30 |
| 13:00 | 7:30 | 2:30 | 0:30 |
| 14:00 | 8:30 | 3:30 | 1:30 |
| 15:00 | 9:30 | 4:30 | 2:30 |
| 16:00 | 10:30 | 5:30 | 3:30 |
| 17:00 | 11:30 | 6:30 | 4:30 |
| 18:00 | 12:30 | 7:30 | 5:30 |
| 19:00 | 13:30 | 8:30 | 6:30 |
| 20:00 | 14:30 | 9:30 | 7:30 |
| 21:00 | 15:30 | 10:30 | 8:30 |
| 22:00 | 16:30 | 11:30 | 9:30 |
| 23:00 | 17:30 | 12:30 | 10:30 |
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
- +0530 - basic
- +05:30 - extended
- +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.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2
- Iran Standard Time - UTC +3:30
Universal Time Coordinated
Offset: UTC is 0 hours ahead Greenwich Mean Time (GMT) and is used in Universal
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.
UTC representations, usage and related time zones
- Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
- +00 - basic short
- +0000 - basic
- +00:00 - extended
- +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates zero hour and zero minutes time differences of the zero meridian.
- Zulu - Military abbreviation for UTC
- Z - short form of 'Zulu'
- Etc/UCT
- Etc/UTC
- Etc/Universal
- Etc/Zulu
- UCT
- UTC
- Universal
- Zulu
- 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
Central Standard Time
Offset: CST is 6 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries: It is used in following countries: Belize, Canada, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua, El Salvador, United States
Principal Cities: The largest city in the CST timezone is Mexico City from Mexico with population about 12.294 million people. Other major cities in the area are Chicago, Houston, Iztapalapa, Ecatepec
French: HNC - Heure Normale du Centre
Spanish: CT - Tiempo Central Estándar, CT - Zona Centro
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 Central Daylight Time (CDT).
End: Central Standard Time (CST) has ended on Sunday, March 9, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, March 9, 2025, 3:00 am local daylight time instead. Standard time ends annually the on second Sunday of March.
Start: Central Standard Time (CST) starts on Sunday, November 2, 2025 at 2:00 am local time and clocks are set one hour back to Sunday, November 2, 2025, 1:00 am. Standard time starts annually the on first Sunday of November.
CST representations, usage and related time zones
- -06 - basic short
- -0600 - basic
- -06:00 - extended
- -0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates six hour and zero minutes time differences to the west of the zero meridian.
- Sierra - Military abbreviation for CST
- S - short form of 'Sierra'
- America/Bahia_Banderas
- America/Belize
- America/Chicago
- America/Chihuahua
- America/Costa_Rica
- America/El_Salvador
- America/Guatemala
- America/Indiana/Knox
- America/Indiana/Tell_City
- America/Knox_IN
- America/Managua
- America/Matamoros
- America/Menominee
- America/Merida
- America/Mexico_City
- America/Monterrey
- America/North_Dakota/Beulah
- America/North_Dakota/Center
- America/North_Dakota/New_Salem
- America/Ojinaga
- America/Rainy_River
- America/Rankin_Inlet
- America/Regina
- America/Resolute
- America/Swift_Current
- America/Tegucigalpa
- America/Winnipeg
- CST6CDT
- Canada/Central
- Canada/Saskatchewan
- Mexico/General
- US/Central
- US/Indiana-Starke
- Central Standard Time - UTC -6
- China Standard Time - UTC +8
- Cuba Standard Time - UTC -5
- Colombia Standard Time - UTC -5
- CST - Central Standard Time
- CT - Central Time
- MDT - Mountain Daylight Time
- EAST - Easter Island Standard Time
- GALT - Galapagos Time
- S - Sierra Time Zone
Pacific Time
Pacific Time (PT) is a general term used to describe the areas that observe either the Pacific Standard Time (PST) or Pacific Daylight Time (PDT) in the United States and Canada. PT also called Pacific Coast Time. PT is not static but switches between PDT and PST.
Territories observing the Pacific Time Zone are primarily in North America. It runs through the western part of Canada, the United States and the Northwestern part of Mexico.
Countries: It is used in following countries: Canada, Mexico, United States.
Principal Cities: The largest city in the PST timezone is Los Angeles from USA with population about 3.793 million people. Other major cities in the area are Vancouver, Tijuana, San Diego, San Jose.
French: HNP - Heure Normale du Pacifique
Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste
Pacific Time (PT) is a general term used to describe the areas that observe either the Pacific Standard Time (PST) or Pacific Daylight Time (PDT) in the United States and Canada. PT also called Pacific Coast Time. PT is not static but switches between PDT and PST.
Territories observing the Pacific Time Zone are primarily in North America. It runs through the western part of Canada, the United States and the Northwestern part of Mexico.
Countries: It is used in following countries: Canada, Mexico, United States.
Principal Cities: The largest city in the PST timezone is Los Angeles from USA with population about 3.793 million people. Other major cities in the area are Vancouver, Tijuana, San Diego, San Jose.
French: HNP - Heure Normale du Pacifique
Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste
PT representations, usage and related time zones
- -08 - basic short
- -0800 - basic
- -08:00 - extended
- -0800 - sign character (-) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates eight hour and zero minutes time differences to the west of the zero meridian.
- Uniform - Military abbreviation for PT
- U - short form of 'Uniform'
- Pacific Time - UTC -8
- Ponape Time - UTC +11
- AKDT - Alaska Daylight Time
- PST - Pacific Standard Time
- PT - Pacific Time
- PST - Pitcairn Standard Time
- U - Uniform Time Zone