gistfile1.txt

# event.rb

  def format_day
    self.day.strftime("%B %d, %Y (%A)")
  end
  def day_types
    OpenStruct.new(:day => self.day, :format => self.format_day)
  end

# view
- @events.group_by {|x| x.day_types.day}.each do |day_types, events|
	= link_to day_types.format, "/events/#{day_types.day}"


# render =>

Jan 1
Event 1 on Jan 1

Jan 1
Event 2 on Jan 1

# instead of

Jan 1
Event 1
Event 2