I learned on these boards to go the furthest day out on my vacation that was a scheduled Epcot day for us and get the Frozen fastpass. That would be 67 days out and I got 1:25
I just booked mine for my ten day trip in September. The first two days only had night time availability left (after 7 pm), the third day had one at 1:30, and the other days started at 11:00. I booked the one for three of us first, since the other two haven't seen it yet and are only spending one day at the parks, then booked a couple solo ones on other days for me.