8 9 10 Rule
Standard calling etiquette needed for morons who would otherwise call people at any hour of the day. Monday - Friday you don’t call someone before 8am, Saturday before 9am, or Sunday before 10am.
Bob was awakened by his cell phone ringing at 6:43am. It was his drunk buddy Dale returning Bob’s call from yesterday. Clearly Dale needed to enroll at phone etiquette school to understand the 8 9 10 rule.