[perl #121926] make Date more tolerant, e.g. ("2014-1-31")

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# New Ticket Created by  Hans Ginzel 
# Please include the string:  [perl #121926]
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# <URL: https://rt.perl.org/Ticket/Display.html?id=121926 >


Hello,

make Date more tolerant, please. Ignore missing leading zero.

my $d = Date.new("2014-1-31");

Invalid Date string '2014-1-31'; use yyyy-mm-dd instead
  in method new at gen/parrot/CORE.setting:14941
  in method new at gen/parrot/CORE.setting:795

Thanks
HG