Time Zone Error

I am launching the application on my desktop and attempting to book time. Once i click Book Now and select my site. It then displays the following error " This site's timezone is different from your settings. Please change your timezone to EST, close this page, refresh the home page, and try again. Or, select a different site to continue."

I have verified my timezone and don't see why it is stopping me. Other people are having the same issue. Any help is appreciated. 

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