Add date to event page

It's confusing since the date of the event is never displayed on the event page.  This is especially true when the only date that is shown on the page (the EventBrite "END" date) is something else.

Yeah, I know it's in the URL but most people don't look at URLS like we do. :P

P.S. I wanted to format the date nicer like you format {{ class.date }} on /classes but didn't want to keep looking at it :)