code: def get_time_diff_days(start, end):
      ''' Number of days between two dates in UTC format  '''
  
      if start is None or end is None:
          return None
  
      if type(start) is not datetime.datetime:
          start = parser.parse(start).replace(tzinfo=None)
      if type(end) is not datetime.datetime:
          end = parser.parse(end).replace(tzinfo=None)
  
      seconds_day = float(60 * 60 * 24)
      diff_days = (end - start).total_seconds() / seconds_day
      diff_days = float('%.2f' % diff_days)
  
      return diff_dayf get_time_diff_days(start, end):
      ''' Number of days between two dates in UTC format  '''
  
      if start is None or end is None:
          return None
  
      if type(start) is not datetime.datetime:
          start = parser.parse(start).replace(tzinfo=None)
      if type(end) is not datetime.datetime:
          end = parser.parse(end).replace(tzinfo=None)
  
      seconds_day = float(60 * 60 * 24)
      diff_days = (end - start).total_seconds() / seconds_day
      diff_days = float('%.2f' % diff_days)
  
      return diff_days
docs: Number of days between two dates in UTC format