Preventing booking in the past and preventing users to select a date which is back in time

Question

So I have this model. To not book in the past and 10 days from Date.today works fine. But when I try to book and for example book in the past, the validations still give a green tick next to the date instead of giving the error and letting the user know that their booking wasn't created due to them booking in the past. I'll attach a pic to clarify my problem.

And I was wondering if there is a way to stop users from being able to book in the past. If that would be possible the error on the top would automatically be dismissed

 class Booking < ApplicationRecord

  belongs_to :user
  belongs_to :listing
  validate :not_past_start_date

  def not_past_start_date
    if self.start_date < Date.today + 10
      errors.add(:date, 'please start the booking 10 days from todays date')
    end
  end

  validate :not_past_end_date

  def not_past_end_date
    if self.end_date < Date.today + 16
      errors.add(:date, 'bookings have to be at least a week long')
    end
  end

end

This is the image showing that even though the booking is in the past the program validates it as being true