Lupercalia!
I have a Death Note AU for this - I'm sure everyone's shocked - and it'll be up on AO3 on 12/02/16. I posted an earlier draft here, future-dated, and then found that my antivirus won't let me at the "manage scheduled posts" page so I couldn't edit, which means that 13-through-15 Feb are going to have me messing around with posts as soon as I can (not necessarily the same thing as as soon as they appear).