Why not put yourself first, every once in a while? Your happiness should be your first priority, today. After all, if you aren't happy in your life, how can you be a good sibling, friend, partner, or employee? You shouldn't get lazy about fulfilling the obligations you have to other people, but you should feel free to cut yourself some slack. This is a good day to spend on 'you.' Do what you need to do as early as you can and spend the rest of your day exploring things that interest you.