12:00 pm ET / 9:00 am MST is a convenient time to arrange a meeting
When planning a call between Eastern Time and Mountain Standard Time, you need to consider time difference between these time zones. ET is 3 hours ahead of MST.
It is currently 12:00 pm in ET, which is a suitable time to arrange a call or meeting. In MST, the time would be 9:00 am - a usual working time of between 9:00 am and 3:00 pm.
If you want to reach out to someone in MST and you are available anytime, you can also schedule a call between 10:00 am and 2:00 am your time. This time span will be between 7:00 am and 11:00 pm MST time.