What time do the Dive In Movies usually start on Saturday nights?

[diskids2]

I wanted to get an idea if it was early or later...Does it vary based on the time of the year and the time it gets dark?

 

[rpbert1]

they start at Dusk, was between 8:15 and 8:45 when we where there, they had them on Friday night as well at the RPR when we where there