Lily hadn't been thinking on that type of question. She had just assumed that he was from a time long before her, she went to muggle school after all so she knew history well enough, but she didn't think on asking. She really wasn't sure if that would have been an odd question for him to answer but she was rather glad he didn't seem to mind. Partly because she was curious about where and when he was from purely because she liked to know these things. Maybe there would be something interesting she could find out.
"I'm from 1981. Can I ask you the same thing?" Surely he wouldn't mind. She did wonder how far in the future compared to him that she was.