or download this
$ perl -MTime::Piece -le 'print Time::Piece->strptime( "2015-04-28T11:
+33:12", "%Y-%m-%dT%H:%M:%S" )'
Tue Apr 28 11:33:12 2015
...
Tue Apr 28 11:33:12 2015
$ perl -MTime::Piece -le 'print Time::Piece->strptime( "2015-04-28T11:
+33:12", "%FT%H:%M:%S" )'
Error parsing time ...