code: def _partialParseDateStd(self, s, sourceTime):
          
          parseStr = None
          chunk1 = chunk2 = ''
  
          # Standard date format
          m = self.ptc.CRE_DATE.search(s)
          if m is not None:
  
              if (m.group('date') != s):
                  # capture remaining string
                  parseStr = m.group('date')
                  chunk1 = s[:m.start('date')]
                  chunk2 = s[m.end('date'):]
                  s = '%s %s' % (chunk1, chunk2)
              else:
                  parseStr = s
                  s = ''
  
          if parseStr:
              debug and log.debug(
                  'found (date) [%s][%s][%s]', parseStr, chunk1, chunk2)
              sourceTime = self._evalDateStd(parseStr, sourceTime)
  
          return s, sourceTime, bool(parseStr)
docs: test if giving C{s} matched CRE_DATE, used by L{parse()}
  
          @type  s:          string
          @param s:          date/time text to evaluate
          @type  sourceTime: struct_time
          @param sourceTime: C{struct_time} value to use as the base
  
          @rtype:  tuple
          @return: tuple of remained date/time text, datetime object and
                   an boolean value to describ if matched or not