title: ValueError: unconverted data remains: 00:00:00
body: <p>I have problem in convert date time.</p>
  
  <p>Here is my code:</p>
  
  <pre><code>@api.multi
  def action_confirm(self):
  if picking.state not in ['cancel', 'draft']:
      for schedule_delivery in sorted_key:
  
      print "line 105: ", schedule_delivery
                  dup_picking = picking.copy()
                          if shift == "afternoon":
                              date_object = datetime.strptime(schedule_delivery, '%Y-%m-%d')
                              print "Line 146", date_object
                              # raise EnvironmentError
                              tanggal = datetime.strftime(date_object, "%Y-%m-%d") + ' 06:00:00'
                              print "Line 145", tanggal
                              dup_picking.min_date = tanggal
                          else:
                              dup_picking.min_date = schedule_delivery
  </code></pre>
  
  <p>Error:</p>
  
  <pre><code>    date_object = datetime.strptime(schedule_delivery, '%Y-%m-%d')
    File "/usr/lib/python2.7/_strptime.py", line 328, in _strptime
      data_string[found.end():])
  ValueError: unconverted data remains:  00:00:00
  </code></pre>