#!/usr/bin/perl %num2mon = qw( 01 Jan 02 Feb 03 Mar 04 Apr 05 May 06 Jun 07 Jul 08 Aug 09 Sep 10 Oct 11 Nov 12 Dec ); s/\[(..)h:(..)m:(..)s_(..)\/(..)\/(..)\](.+)/"$num2mon{$4} $5 $1:$2:$3$7"/eg