I am in the Eastern time zone, and the default times appeared to be 3 hours before me which would be Pacific Time.  How do I assure my test & tournament times will be in Eastern time?

Your timezone was set when the Scilympiad website was created for you and you selected which timezone. All activities with timestamps on your website will be based on the timezone you selected. If it's incorrect, please inform us at info@scilympiad.com.