Tehran, Iran to Boulder, CO, USA
Time Difference
IST (Iran Standard Time) is 9 hours and 30 minutes ahead of MDT (Mountain Daylight Time)
12:00 am00:00 in Tehran, Iran is 2:30 pm14:30 in Boulder, CO, USA
Tehran to Boulder call time
Best time for a conference call or a meeting is between 5:30pm-7:30pm in Tehran which corresponds to 8am-10am in Boulder
12:00 am00:00 IST (Iran Standard Time) (Tehran, Iran). Offset UTC +3:30 hours
2:30 pm14:30 MDT (Mountain Daylight Time) (Boulder, CO, USA). Offset UTC -6:00 hours
12:00 am00:00 Tehran, Iran / 2:30 pm14:30 Boulder, CO, USA
| Tehran, Iran | Boulder, CO, USA |
|---|---|
| 12am (midnight) | 2:30 pm |
| 1am | 3:30 pm |
| 2am | 4:30 pm |
| 3am | 5:30 pm |
| 4am | 6:30 pm |
| 5am | 7:30 pm |
| 6am | 8:30 pm |
| 7am | 9:30 pm |
| 8am | 10:30 pm |
| 9am | 11:30 pm |
| 10am | 12:30 am |
| 11am | 1:30 am |
| 12pm (noon) | 2:30 am |
| 1pm | 3:30 am |
| 2pm | 4:30 am |
| 3pm | 5:30 am |
| 4pm | 6:30 am |
| 5pm | 7:30 am |
| 6pm | 8:30 am |
| 7pm | 9:30 am |
| 8pm | 10:30 am |
| 9pm | 11:30 am |
| 10pm | 12:30 pm |
| 11pm | 1:30 pm |
| 0:00 | 14:30 |
| 1:00 | 15:30 |
| 2:00 | 16:30 |
| 3:00 | 17:30 |
| 4:00 | 18:30 |
| 5:00 | 19:30 |
| 6:00 | 20:30 |
| 7:00 | 21:30 |
| 8:00 | 22:30 |
| 9:00 | 23:30 |
| 10:00 | 0:30 |
| 11:00 | 1:30 |
| 12:00 | 2:30 |
| 13:00 | 3:30 |
| 14:00 | 4:30 |
| 15:00 | 5:30 |
| 16:00 | 6:30 |
| 17:00 | 7:30 |
| 18:00 | 8:30 |
| 19:00 | 9:30 |
| 20:00 | 10:30 |
| 21:00 | 11:30 |
| 22:00 | 12:30 |
| 23:00 | 13:30 |
Tehran Information
Time Zone
Abbreviation / Name
IST - Iran Standard Time
IRDT - Iran Daylight Time
IRDT - Iran Daylight Time
UTC / GMT Offset
+3:30 hours during Iran Standard Time, currently in use.
+4:30 hours during Iran Daylight Time.
+4:30 hours during Iran Daylight Time.
Daylight Saving Time Change
+1:00 hour - DST is NOT in use
Daylight Saving Time Starts
Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
Also called Fall Back or switch to Winter Time.
Tehran Facts
Country
Iran
Alternative Names
THR, Taekhran, Tahran, Techerane, Teera, Teerao, Teerã, Teerão, Tegeran, Teheran, Teherana, Teheranas, Teherano, Teherán, Teherāna, Tehran, Tehrano, Tekheran, Téhéran, de hei lan, teharan, teharana, tehelan, teheran, tehran, teirani, thran, thrn, thrwn, tihiran, tihran, Τεχεράνη, Тæхран, Тегеран, Техеран, Теҳрон, Թեհրան, טהראן, טהרן, تهران, تهرون, تِهران, تِهِرَن, تہران, طهران, ܛܗܪܐܢ, तेहरान, তেহরান, தெஹ்ரான், เตหะราน, ཏེ་ཧི་རན།, თეირანი, ቴህራን, テヘラン, 德黑兰, 테헤란
Population
7,153,309
Currency
Rial (IRR)
Geographic Coordinates
35° 41' N Latitude / 51° 25' E Longitude
International Dialing Code
+98
Boulder Information
Time Zone
Abbreviation / Name
MDT - Mountain Daylight Time
HAR - Heure Avancée des Rocheuses
HAR - Heure Avancée des Rocheuses
UTC / GMT Offset
-6:00 hours during Mountain Daylight Time, currently in use.
-6:00 hours during Heure Avancée des Rocheuses.
-6:00 hours during Heure Avancée des Rocheuses.
Daylight Saving Time Change
0:00 hours - DST is in use
Daylight Saving Time Starts
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.
Daylight Saving Time Ends
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.
Boulder Facts
Country
USA
State
Colorado
Alternative Names
Bolder, Boulder, Bouldur, WBU, ba'uldara, bo de, boldara, bolde xr, boldeo, boruda, bwldr, bwldr klradw, Болдер, Боулдер, Боулдър, בולדר, بولدر, بولدر، کلرادو, بولڈر، کولوراڈو, बाउल्डर, बोल्डर, โบลเดอร์, ボルダー, 波德, 볼더
Population
107,349
Currency
Dollar (USD)
Geographic Coordinates
40° 00' N Latitude / 105° 16' W Longitude
International Dialing Code
+1