CAST to IST Converter
Quick answers
CAST is 2 hours and 30 minutes ahead of IST year-round.
Working hours of 9:00 am to 5:00 pm in CAST correspond to 6:30 am to 2:30 pm in IST.
For example, 8:00 pm CAST is 5:30 pm IST. Use the converter above to adjust the date or time and create a shareable meeting link.
Best meeting overlap: 11:30am-5pm CAST, which is 9am-2:30pm IST.
Compare CAST time with IST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Casey Time is 2 hours and 30 minutes ahead of India Standard Time
8:00 pm20:00 in CAST is 5:30 pm17:30 in IST
CAST to IST call time
Best time for a conference call or a meeting is between 11:30am-5pm in CAST which corresponds to 9am-2:30pm in IST
8:00 pm20:00 Casey Time (CAST). Offset UTC +8:00 hours
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
8:00 pm20:00 CAST / 5:30 pm17:30 IST
| CAST | IST |
|---|---|
| 12am (midnight) | 9:30 pm |
| 1am | 10:30 pm |
| 2am | 11:30 pm |
| 3am | 12:30 am |
| 4am | 1:30 am |
| 5am | 2:30 am |
| 6am | 3:30 am |
| 7am | 4:30 am |
| 8am | 5:30 am |
| 9am | 6:30 am |
| 10am | 7:30 am |
| 11am | 8:30 am |
| 12pm (noon) | 9:30 am |
| 1pm | 10:30 am |
| 2pm | 11:30 am |
| 3pm | 12:30 pm |
| 4pm | 1:30 pm |
| 5pm | 2:30 pm |
| 6pm | 3:30 pm |
| 7pm | 4:30 pm |
| 8pm | 5:30 pm |
| 9pm | 6:30 pm |
| 10pm | 7:30 pm |
| 11pm | 8:30 pm |
| 00:00 | 21:30 |
| 01:00 | 22:30 |
| 02:00 | 23:30 |
| 03:00 | 00:30 |
| 04:00 | 01:30 |
| 05:00 | 02:30 |
| 06:00 | 03:30 |
| 07:00 | 04:30 |
| 08:00 | 05:30 |
| 09:00 | 06:30 |
| 10:00 | 07:30 |
| 11:00 | 08:30 |
| 12:00 | 09:30 |
| 13:00 | 10:30 |
| 14:00 | 11:30 |
| 15:00 | 12:30 |
| 16:00 | 13:30 |
| 17:00 | 14:30 |
| 18:00 | 15:30 |
| 19:00 | 16:30 |
| 20:00 | 17:30 |
| 21:00 | 18:30 |
| 22:00 | 19:30 |
| 23:00 | 20:30 |
Casey Time
Offset: CAST is 8 hours ahead Greenwich Mean Time (GMT) and is used in Antarctica
Countries using this time zone: Antarctica
Daylight Saving: Clocks in Casey Time (CAST) do not change for daylight saving time, so CAST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.
CAST 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 an offset of eight hours to the east of the zero meridian.
- Hotel - Military abbreviation for CAST
- H - short form of 'Hotel'
- ACT - ASEAN Common Time
- AWST - Australian Western Standard Time
- BNT - Brunei Darussalam Time
- CAST - Casey Time
- CHOT - Choibalsan Time
- CST - China Standard Time
- H - Hotel Time Zone
- HKT - Hong Kong Time
- HOVST - Hovd Summer Time
- IRKT - Irkutsk Time
- KRAST - Krasnoyarsk Summer Time
- MYT - Malaysia Time
- PHT - Philippine Time
- SGT - Singapore Time
- ULAT - Ulaanbaatar Time
- WITA - Central Indonesian Time
India Standard Time
Offset: IST is 5 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia
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, Bangalore, Kolkata, Chennai.
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.
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