You can fly as many missions as you are offered on one day. When the missions are finished the time will advance automagically and then you have to stop until the next day. You can also advance manually if you don't fly for a few days. That is why the setting is 'auto/manual'. I wondered about this myself winkngrin

LG 27" 27mp65 monitor; EVGA GTX970 GPU; AMD Ryzen 3500 CPU; Corsair 750w PSU; MSI X470 mobo

RAF 1966-73 Cpl Engine Fitter (Retd.) Trenchard brat 206th Entry
DBA and systems programmer 1981-2005. Now retired since 2014