All international Aviation is done in UTC, there is no need for local times until you step off the aircraft and adjust your watch to see if the 'local facilities' are still open.
In terms of 'RTA' or 'TOT' (Time on Target) then military people work to those on a daily basis. It is always done in UTC, there is no need for added confusion of different time zones. If you want to know the local time in flight then you get your smartphone out, or simply figure out the time zone difference and use your head.