When do FDP times extend?

[OCDisney]

Recently made a Fastasmic Dinner Package PS for September and the latest time they could give me was 4:30pm.

I know they will open up later seatings as we get closer, but does anyone know exactly when?

What's your experience?

TIA

 

[EEyorelover22]

Try around the 30 day mark or a few days before. I started with 4:30 and ended up with 6:10 for June.