Lyric discussion by anonymoustrash 

Cover art for The Calendar lyrics by Panic! at the Disco

Generally I think this can be a song about how it feels to know there's a timer on a relationship.

"There is simply nothing worse than knowing how it ends"

They know the clock is ticking on the relationship, but can't do anything about it. Theyre left counting the days of the calendar, waiting for it to end like they know it will.