"Friday, last I knew," Remus answered with far more calm than he felt, stepping out from behind the small boulder where he'd hidden at the sound of voices.
He really wasn't certain what had happened. He'd been making his way down a backroad that might have actually been a cow path and then he'd stepped into a clearing that had resembled nothing so much as the Hogwarts grounds. It had turned out to be the Hogwarts grounds when he'd looked up and seen familiar towers rising against the Highlands. He had been on his way to see what Dumbledore knew about how Remus might have gotten there when he heard a familiar voice call out. A voice he hadn't heard in a year and a half.
The shock of hearing Sirius had more to do with Remus staying still in hiding more than any natural instinct this close to the Full, if he was honest with himself.
But, he wasn't being honest with himself because that would allow for the tangle of emotions -- anger, joy, resentment, confusion -- that voice invoked to take control and this was turning into a situation where he very definitely needed control.
"Although, I'm not sure that's accurate now," he added, hands slipping into his pockets as he kept a bit of distance between himself and the two brothers, "if the Hogwarts elves are telling yours it's more than fifty years into the future." Remus could go with that explanation for now. The Hogwarts elves were mostly reliable and the Black house elf seemed genuinely shaken by the news.