"Day 2" definition please

[whitetop]

427TJ

Here is a Camaro that is in the truest sense Day 2. Second owner but bought the car in 1970 from the dealership after the first owner traded it back in with 2K miles.Modified the car in the '70-'73 era. Garaged in mothers garage since 1975 and brought out last year for the first time since then because the mom was going into a nursing home and the house was being sold. Car has 32 or 37K original miles and has only touch up paint here and there (on the bottom of the fenders etc).