Two solutions. 
# This is 165 characters
for(grep{/(..)(..)/;$1<24&&$2<60}map{sprintf"%04d",$_}0..2359){($t=$_)
+=~s/(..)(..)/$1:$2/;$y=reverse;print map{"$t\t$_\t$y\n"}qw(10/01 20/0
+2 30/03 01/10 11/11 21/12)}
----
# This is 164 characters
map{($t=$_)=~s/(..)(..)/$1:$2/;$y=reverse;print map{"$t\t$_\t$y\n"}qw(
+10/01 20/02 30/03 01/10 11/11 21/12)}grep{/(..)(..)/;$1<24&&$2<60}map
+{sprintf"%04d",$_}0..2359

[download]
Update: Changed || to && as per metadoktor's note. This fixes the bug found.

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In reply to Re: Symmetrical Date Golf by dragonchild
in thread Symmetrical Date Golf by ryan

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