Tehran and Dallas time difference is 9 hours, 30 minutes


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If you are located in Tehran and would like to make a phone call to or have a video chat with someone in Dallas, due to the large time difference of 9 hours, 30 minutes between these two cities You will have to organise it out of your regular working hours. Dallas time is 9 hours, 30 minutes behind Tehran time. So the ideal time to get in touch with the other party in Dallas would be between 6:30pm to 2:30am (Tehran time).


See distance from Tehran to Dallas

Time difference comparison

12 am Tehran2:30pm previous day Dallas
1 am Tehran3:30pm previous day Dallas
2 am Tehran4:30pm previous day Dallas
3 am Tehran5:30pm previous day Dallas
4 am Tehran6:30pm previous day Dallas
5 am Tehran7:30pm previous day Dallas
6 am Tehran8:30pm previous day Dallas
7 am Tehran9:30pm previous day Dallas
8 am Tehran10:30pm previous day Dallas
9 am Tehran11:30pm previous day Dallas
10 am Tehran12:30am Dallas
11 am Tehran1:30am Dallas
12 pm Tehran2:30am Dallas
1 pm Tehran3:30am Dallas
2 pm Tehran4:30am Dallas
3 pm Tehran5:30am Dallas
4 pm Tehran6:30am Dallas
5 pm Tehran7:30am Dallas
6 pm Tehran8:30am Dallas
7 pm Tehran9:30am Dallas
8 pm Tehran10:30am Dallas
9 pm Tehran11:30am Dallas
10 pm Tehran12:30pm Dallas
11 pm Tehran1:30pm Dallas

The hours shown in blue color are the usual 9 am to 5 pm business hours.


Tehran, Iran is 9 hours, 30 minutes ahead of Dallas, Texas, USA

Change of time difference between Tehran and Dallas

Date Time difference
08 March 2020 to
21 March 2020 (DST begins in Tehran)
8 hours 30 minutes
21 March 2020 to
21 September 2020 (DST ends in Tehran)
9 hours 30 minutes
21 September 2020 to
01 November 2020 (DST ends in Dallas)
8 hours 30 minutes

Time difference between IRDT (Iran Daylight Time) and CDT (Central Daylight Time) is 9 hours, 30 minutes



Tehran - Iran

  • Time zone: IRDT - Iran Daylight Time
  • Time zone offset: UTC/GMT +4:30
  • DST started on: 21 March 2020
  • DST will end on: 21 September 2020
    When Daylight Saving Time ends, the time zone in Tehran will return to IRST (Iran Standard Time).


Dallas - USA

  • Time zone: CDT - Central Daylight Time
  • Time zone offset: UTC/GMT -5
  • DST started on: 08 March 2020
  • DST will end on: 01 November 2020
    When Daylight Saving Time ends, the time zone in Dallas will return to CST (Central Standard Time).