IST to Boulder, MT, USA
Time Difference
India Standard Time is 11 hours and 30 minutes ahead of MDT (Mountain Daylight Time)
9:30 pm21:30 in IST is 10:00 am10:00 in Boulder, MT, USA
IST to Boulder 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 Boulder
9:30 pm21:30 India Standard Time (IST). Offset UTC +5:30 hours
10:00 am10:00 MDT (Mountain Daylight Time) (Boulder, MT, USA). Offset UTC -6:00 hours
9:30 pm21:30 IST / 10:00 am10:00 Boulder, MT, USA
| IST | Boulder, MT, USA |
|---|---|
| 12am (midnight) | 12:30 pm |
| 1am | 1:30 pm |
| 2am | 2:30 pm |
| 3am | 3:30 pm |
| 4am | 4:30 pm |
| 5am | 5:30 pm |
| 6am | 6:30 pm |
| 7am | 7:30 pm |
| 8am | 8:30 pm |
| 9am | 9:30 pm |
| 10am | 10:30 pm |
| 11am | 11:30 pm |
| 12pm (noon) | 12:30 am |
| 1pm | 1:30 am |
| 2pm | 2:30 am |
| 3pm | 3:30 am |
| 4pm | 4:30 am |
| 5pm | 5:30 am |
| 6pm | 6:30 am |
| 7pm | 7:30 am |
| 8pm | 8:30 am |
| 9pm | 9:30 am |
| 10pm | 10:30 am |
| 11pm | 11:30 am |
| 0:00 | 12:30 |
| 1:00 | 13:30 |
| 2:00 | 14:30 |
| 3:00 | 15:30 |
| 4:00 | 16:30 |
| 5:00 | 17:30 |
| 6:00 | 18:30 |
| 7:00 | 19:30 |
| 8:00 | 20:30 |
| 9:00 | 21:30 |
| 10:00 | 22:30 |
| 11:00 | 23:30 |
| 12:00 | 0:30 |
| 13:00 | 1:30 |
| 14:00 | 2:30 |
| 15:00 | 3:30 |
| 16:00 | 4:30 |
| 17:00 | 5:30 |
| 18:00 | 6:30 |
| 19:00 | 7:30 |
| 20:00 | 8:30 |
| 21:00 | 9:30 |
| 22:00 | 10:30 |
| 23:00 | 11:30 |
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
Boulder Information
Time Zone
HAR - Heure Avancée des Rocheuses
-6:00 hours during Heure Avancée des Rocheuses.
Sunday, March 9, 2025 at 2:00 am local time. DST starts annually the on second Sunday of March. Clocks are turned forward 0 hour to Sunday, March 9, 2025, 3:00 am local daylight time instead. Also called Spring Forward or Summer Time.
Sunday, November 2, 2025 at 2:00 am local time. DST ends annually the on first Sunday of November. Clocks are turned backward 0 hour to Sunday, November 2, 2025, 1:00 am local standard time instead. Also called Fall Back or switch to Winter Time.