One of the most common questions Jewish organizations get are when holidays actually start. The Jewish calendar is based on the Lunar Calendar. Most major Jewish holidays begin on the Full Moon — it makes it pretty easy to keep track of a holiday in a pre-Google Calendar society. To make it even more confusing, though, the Jewish “Day” starts the night before at sundown. Most calendars aren’t very specific as to the actual date (evening vs. day). So for the Adventure Rabbi program, we created a quick page that answers the question, When is the first night of Passover Seder in 2011? Or, When does Passover start in 2011? This way, it’s really easy for someone to find out… and not miss the holiday.