That’s miles, not days in the year.
It’s how many miles my friend Davis Straub (author of the "Windows […] Secrets" series of books) flew in a hang-glider on Tuesday–half way across the state of Texas. This isn’t him (another friend), but it’s the same wing (ATOS VR) and how he’d be looking in flight gear.
It’s "only" 365 because he flew 427 miles in 2001 from the same place.
Go read his flight report.