February 1 Is "Change Your Password" Day

good point!

http://gizmodo.com/5879669/february-1-is-change-your-password-day-ive-decided

This article suggests passwords that need to be changed, and how often

February 1 is change your password day. But don't make it a one-time thing. Password changing should be a routine you practice regularly. Like hand-washing, or trolling Facebook. Especially ones you've shared. There are all kinds of obvious times to change your password: if an account has been hacked, if mysterious charges apear on your credit cards. But there are plenty of non-obvious times as well. I mean, think of your accounts like your home: your passwords are the keys that open the doors. After your psycho ex moves out, you want to make sure you don't come home one day to find they've stolen the stereo and boiled your cat. Here's when to change the locks.

http://gizmodo.com/5880013/the-best-time-to-change-your-all-your-passwords