Quarter-Month
25% of a month. Usually reached within the 7th or the 8th day of said month.
Person 1: Hey, it's the 7th today. You know what that means?
Person 2: What?
Person 1: It's Quarter-Month!
Person 2: Hooray!
Person 2: What?
Person 1: It's Quarter-Month!
Person 2: Hooray!