Hi Eric,
I am sorry for the confusion.
To configure your default timezone when user register with EasySocial, go to EasySocial backend under Profile types -> [select your profile type] -> Custom fields and click on your timezone field and you should see the setting screen for your timezone field. Click on the 'core' tab and you should see the 'default value' textfield. Enter your timezone in this 'default value' inputtext. Please see screencast.com/t/E3qbXBXSxYA
When your user register, the timezone will be defaulted to the timezone you've configured
Hope this help.