in reply to Re^2: strptime("%Y-%m") in perl6
in thread strptime("%Y-%m") in perl6

But also 
$ perl -MTime::Piece -le 'localtime()->strptime(shift, "%Y-%m-%d"); pr
+int "ok"'  2019-02-30
ok

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map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In Section Seekers of Perl Wisdom