title: Date in Kivy language
body: <p>I am having a hard time getting Kivy's slider to recognize my date values.
  Below is the code.</p>
  
  <pre><code>Slider:
      min: root.minimumdate()
      max: root.maximumdate()
      value: root.maximumdate()
      pos: root.width/200, root.height/1.159
      width: root.width/2.9
      height: root.height/10
  </code></pre>
  
  <p>Minimumdate and maximumdate functions return my lower and upper bound date values formatted as (YYYY-MM); however, kivy language does not seem to recognize the date values. Is there a date conversion I need to do before using it as slider values?</p>
  
  <p>Any help would be appreciated.</p>
  
  <p>Thanks!</p>