docs: def _split_date(self, time):
          """Split apart a date string."""
          if isinstance(time, str):
              month, day, year = [int(t) for t in re.split(r'-|/', time)]
              if year < 100:
                  # Quick hack for dates < 2000.
                  year += 2000
              time = date(year, month, day)
          return time.strftime('%Y-%m-%dT%H:%M:%SZ')