Jimmy's Calendar records his days as scratches in a server's black paint, organized into thirty-day months and a year with five additional days.
Jimmy scratches a mark into a server's black paint each evening. His first two months of marks take up so much room that he starts again on the other side.
The revised calendar groups days into thirty-day months, with five extra days after twelve months to complete a year. A year's marks cover half the side of a server.
Marks scratched through the black paint on a server; a year's marks occupy half of one side.
It is Jimmy's physical record of passing days.