$_ = "Accepted and agreed to by Jerry Smith
    as
of
          the 1st
   day of
         November
                 2005.";
print $1 if /(\d+(?:st|nd|rd|th)\s+day\s+of\s+[ADFJMNOSabceghilmnoprstuvy]+\s+\d+)/ms;
__END__
1st
   day of
         November
                 2005