"What?" Sirius puts his bags down and gets his wand out, sending them into the kitchen where they will hopefully sort themselves into the right places (it’s a bit tricky, doing that while you’re in another room). "I thought the moon was last week, and you only missed one day, really." Remus hadn’t allowed Sirius to join him for the moon, but he and Hope had stood vigil that night, and Remus had acquiesced to Sirius assisting him in healing him and providing potions.