In-game time is distinct from irl time bc it runs fast like in many sandbox games, you can check it by looking clock seen at the top of your PDA. When a contract says a job has to be done in, say, 4 hours, that’s “4 hours” on the in-game clock, which irl is a matter of minutes.
irl time is just uh… the time in real life. This is only worth mentioning because it’s the basis for the ETA in the navmap. So if you set up a route and the ETA says like, “14 minutes” that’s 14 minutes in real time but god-knows-how-many-hours on the in-game clock.
Where it gets confusing imo is judging how long it’ll take to get to a destination for a contract according to the in-game clock, bc if you haven’t done enough contracts to get a rough sense of it then you need to just keep bringing up the PDA to check. I’m kinda used to thinking in two different clocks when I play the game but it feels like there must be a way for the devs to make things a bit more intuitive, even if it just means sticking a live in-game clock in the corner of the nav-map or around the different rooms or something instead of having to roughly convert it in your head when you’re plotting a route.