9pm Eastern Time would be 7pm Mountain Time - there's a 2 hour difference.
If It's 9pm Eastern Time, What Time Is It In Mountain Time Zone?
It would be 7pm Mountain time
As others have mentioned, it would be 7pm. If you are looking east to west in the U.S.: 9pm Eastern, 8pm Central, 7pm Mountain, 6pm Pacific, 5pm Alaskan and 4pm Hawaiian.