" Oh, you did? That's awesome because that's the idea ;( ! With my age, I didn't get this era of arcade games :( but making people remember this good time is cool XD. "
Now, I remembered that some games, because of this, used storage of estimated real-world end date only. For example:
I have a gate that will open in 2 minutes. I just store the hour/date the gate will open, and show on screen the countdown in something like that:
Every Tick >>
Timer set text to: FinalTime - CurrentTime
Well, its what all the mobile games use.