"I hadn't realized that." A full moon on Christmas. That would certainly ruin a fair few holidays. Simon frowned. "I'm sorry to hear it. But if you--and your friend, of course--get tired of partying, you can come by my parents' house for a rousing vegetarian version of a Sunday roast. Mum's actually a decent cook when she puts her mind to it and you'll be far more interesting than my aunts and cousins."