Your calendar files do not contain the number of laps or event and track logo names. Otherwise, all fields are as described below. Here is a screenshot of the file. Here's a quick schematic of the line. We'll describe each item in detail later.
XX is the race number.
These must be consecutive numbers throughout the file, starting with 1. And remember, you can't have more than 40 events in one calendar. YY is the month and ZZ is the day. The Track Directory is the exact name of the track folder in your tracks folder. It should also be the name of the track's DAT file, minus the extension.