I wish the elapssed time that I flying and if I'm on a time mission , I want that the computer show me my rest time (I fly, I shoot, I make a fly route, what about the computer :-) )

yes, I have also asked for a countdown timer for the timed trade missions. you can check the GMT clock by using /time in the chat line.

Or you can bind the time command to an unused key. The only problem is that it's GMT only but it isn't too hard to convert.
[i.e. bind /time , ]

I can vouch for that :D