Assign the default value you want, in the new action. date_select() will do the right thing with it in the view.
e.g.
def new @calendar_event = CalendarEvent.new :start_date => "2006-01-01".to_date end
Are you sure you want the default year to be 2006, and not the current year?
e.g.
def new @calendar_event = CalendarEvent.new :start_date => Time.parse("#{Time.today.year}-01-01") end
Ciao, Sheldon.