Time in IRST and CHOST
The time difference between Iran Standard Time (IRST) and Choibalsan Summer Time (CHOST) is 5 hours 30 minutes. Choibalsan Summer Time is 5 hours 30 minutes ahead of Iran Standard Time.
This means 9am IRST is 2:30pm CHOST and 5pm IRST is 10:30pm CHOST.
Iran Standard Time
- The current local time in IRST is 2:13 am (July 19, 2026)
- IRST time zone offset is UTC+03:30
Choibalsan Summer Time
- The current local time in CHOST is 7:43 am (July 19, 2026)
- CHOST time zone offset is UTC+09:00
How to convert Iran Standard Time to Choibalsan Summer Time?
Add 5 hours 30 minutes to Iran Standard Time to get Choibalsan Summer Time.
Time in IRST
00:00
Time in CHOST
00:00
Use the slider above to convert Iran Standard Time to Choibalsan Summer Time and view the day and night map at different times.
Day–night colors on the map:
Day
Civil twilight
Nautical twilight
Astronomical twilight
NightTime Conversion Chart
| IRST | CHOST |
|---|---|
| 12am | 5:30am |
| 1am | 6:30am |
| 2am | 7:30am |
| 3am | 8:30am |
| 4am | 9:30am |
| 5am | 10:30am |
| 6am | 11:30am |
| 7am | 12:30pm |
| 8am | 1:30pm |
| 9am | 2:30pm |
| 10am | 3:30pm |
| 11am | 4:30pm |
| 12pm | 5:30pm |
| 1pm | 6:30pm |
| 2pm | 7:30pm |
| 3pm | 8:30pm |
| 4pm | 9:30pm |
| 5pm | 10:30pm |
| 6pm | 11:30pm |
| 7pm | 0:30am |
| 8pm | 1:30am |
| 9pm | 2:30am |
| 10pm | 3:30am |
| 11pm | 4:30am |