Customize Your Account
Admins, where to fill in the email address for users
Users tab > Item properties (wrench) next to user > Advanced tab > enter email here.
Users, Where to add/change email
Click on your username in the top right, select User Settings > Security > E-mail
Click on your username in the top right corner, and select User Settings:
From here, you can change your time zone and change daylight savings settings as well.