It wasn't a single Paschal service, but a series of services from 6:30 PM til 4:00 AM which, yes, included a three-hour reading of the Acts of the Holy Apostles. The Paschal service proper began at midnight. I'm really not all that in the know, so I can't tell you exactly what we did other than that.
There was another 2 hour earlier in the day, so, on the whole, I spent 11 hours or so in church, of the 15 1/2 I was awake.
I don't know how my 80 year-old great-grandfather does it.