Tuesday Sep 5th at 11 am MST.
Are you
sure about that time? Because the last time I checked, Standard Time doesn't start until November 5th this year.
MST is Mountain Standard Time, which we're not in and won't be at launch time.
MDT is Mountain Daylight Time, which will be in effect.
Unless, of course, you live in Arizona outside of selected First Nations regions, which doesn't observe Daylight Saving Time at all, in which case, carry on...
Because of confusing crap like that, I sometimes find it easier to just use Universal Coordinated Time (UTC) or Greenwich Mean Time (GMT), also known in the military as Zulu time - it never changes with the seasons, legislation or jurisdictions.