What time on animal crossing can you get music?

On Saturdays From 9 PM until 11 I think. Go into the museum and go to the Coffee shop on the left. K.K. Slider should be there on the stage with his guitar. go up to him and ask for a song, you'll listen to the song and then he'll give you a 'bootleg'. Go to your house and go over to the tape deck or whatever sound system you have. Then there should be a + button and you click/tap on that and it will take you to your inventory.