argument error

ArgumentError in EventsController#save_event
invalid date

Extracted source (around line #8):
  
  @event = Event.new(event_params)
    @event.start_date = params[:event][:start_date_date].to_datetime
    @event.end_date = params[:event][:end_date_date].to_datetime
    if params['redirect_to']
      redirect = params['redirect_to']
    else

gistfile1.txt

>>  params
=> <ActionController::Parameters {"utf8"=>"✓", "authenticity_token"=>"uWyyQe6P1Gsw86V3FvPJxUSEIgtR97vFQ8U6ZY9D9AOkhWZcjjhE1bVfLw+fL3toUxUzILzPsXz1ePmsRXl6Pg==", "event"=><ActionController::Parameters {"name"=>"cotton ball", "type_of_event"=>"game", "start_date_date"=>"02/12/2017", "end_date_date"=>"02/13/2017", "location_name"=>"cotton arena", "address"=>"cotton street", "city"=>"cotton city", "state"=>"CA", "zip"=>"90210", "details"=>"we're pickin cotton!!", "send_alert"=>"0", "send_text"=>"0", "send_email"=>"0", "phone"=>"999-999-9999", "email"=>"me@mail.com", "alert_days"=>"", "user_id"=>"45"} permitted: false>, "redirect_to"=>"/my-activity", "controller"=>"events", "action"=>"save_event"} permitted: false>

save_event_action.rb

  def save_event
    @event = Event.new(event_params)
    @event.start_date = params[:event][:start_date_date].to_datetime
    @event.end_date = params[:event][:end_date_date].to_datetime
    if params['redirect_to']
      redirect = params['redirect_to']
    else
      redirect = '/my-activity'
    end
    respond_to do |format|
      if @event.save
        format.html { redirect_to redirect, notice: 'Event was successfully created.' }
        format.json { render :show, status: :created, location: @event }
      else
        format.html { render :new }
        format.json { render json: @event.errors, status: :unprocessable_entity }
      end
    end
  end