To change your Timezone or User Profile, highlight the "My Account" tab and go to Settings.
Click on the drop down menu under Timezone, and select whichever timezone applies. Don't forget to click on "Apply" when you're done!
To change your Profile, click on "Edit Profile & Password" under the "My Account Menu".
Here you can change or update your name, password, and email. Once you're done, hit the "Submit" button, and you're good to go!