Do all classes race on Sunday?

[GE4x4]

I noticed there are 24 classes for the series. How do you fit all them in on one day?

[Polaris 450MXR]

All Classes run on race day (Sunday) Everyone gets two lap practice in the morning and 2 moto format 4 laps kids through A class. Pro am 6 laps pro 8 laps. Usually do very good at getting all laps at most places every now & again the end of the day motos get cut to three laps.