What calendar event would you be interested in the most?

I want an idea on WHEN we get around to adding the first calendar event, what we should try implementing into the game. As mention in the previous poll, these events will have be like a 'hosted' event by one of the Romanceable characters.

These are just some ideas, nothing set in stone and are subject to changes. Feel free to leave your suggestions in the comments, we might like your ideas more.