well there is game_time plugin as i know.
maybe this can help?
but the problem there is that this game cannot have universal time.
cuz game can be played on different speeds.
so you cannot just measure "game timings" in "minutes and seconds"
well if you really want i can make timer that shows the actual "game ticks" that elapsed from start of the game.
i can include it into war2mod and then everybody on server will have it (i will make is so that you can enable/disable it)
so how do you think about this?