Yes there is a simple way, add a new trigger, set it to be activated by alpha (set it to repeatly if you want people to change it) and put this into the activation line:
skiptime [hours], e.g. "skiptime 8"
Then, if you're a group leader or allone, you can skip the time by using 0-0-1.
That's ofcourse not very atmospheric, I would add the skiptime by a useraction added to e.g. a tent (to simulate sleep) followed by a short blackout and blackin to not switch the time in an instant, if you want I can make up such a script on the weekend.