Ruby

“Annie used to have a funny theory: we all have a Year Zero around which the calendars of our lives pivot. At some point you meet someone, and they become so important, so metamorphic, that ten, twenty, sixty-five years down the line you look back and realize that you could split your existence in two. Before they showed (BCE), and your Common Era. Your very own Gregorian calendar.”
― Ali Hazelwood, Love on the Brain