%p
  Setup the time frame in which people can register to your conference
= form_for(@registration_period, url: admin_conference_registration_period_path(@conference.short_title)) do |f|
  .form-group
    = f.label :start_date
    %abbr{title: 'This field is required'} *
    %p.small
      Must be before conference end (#{@conference.end_date}) and the end date
      - if @registration_period.end_date
        (#{@registration_period.end_date})
      below
    = f.date_field :start_date, required: true, class: 'form-control', max: @conference.end_date, required: true
  .form-group
    = f.label :end_date
    %abbr{title: 'This field is required'} *
    %p.small
      Must be before conference end (#{@conference.end_date})
    = f.date_field :end_date, required: true, class: 'form-control', max: @conference.end_date, required: true
  %p.text-right
    = f.submit 'Save Registration Period', class: 'btn btn-primary'