code: def update_datetime(value, range = None):
          
          range = range if range != None else 10
          if range < 0:
              return value
          
          days = RandomFloat.next_float(-range, range)
  
          return value + datetime.timedelta(days)
docs: Updates (drifts) a Date value within specified range defined
  
          :param value: a Date value to drift.
  
          :param range: (optional) a range in milliseconds. Default: 10 days
  
          :return: an updated DateTime value.