An hour a day is honestly nothing...most high school musicians spend like 50 minutes a day in orchestra or concert band, then two and a half or three hours in marching band, and maybe an extra hour in jazz band, and if they have their own band, two or three hours a week there.
When I was in high school, I had a practice schedule that was roughly 8 hours a day M-S, then 4 or 6 on Sunday. I would take days off, of course. It was rare.
An average band that plays out (by themselves, not in multi-band shows) is going to play three or four hours of music, and needs to be able to do it without getting tired and losing steam, so you have to have chops built up from hours of practice to do that.