LORELAI: Mr. Medina’s class, huh?
RORY: The fancy book owner himself.
LORELAI: How does first annual mother/daughter ditch day sound?
Ditch day (also called skip day) is a tradition in some American schools where the majority of the senior class “ditch” or skip school on one particular day. It’s usually in the spring, at the end of the school semester.
The Annotated Gilmore Girls 