http://www.perlmonks.org?node_id=1082683


in reply to Re: High-speed Date Formatting
in thread *SOLVED* High-speed Date Formatting

The constants for BrowserUk are wrong. They should be:
use constant MONTHS => { qw[ Jan 0 Feb 31 Mar 59 Apr 90 May 120 Jun 151 Jul 181 Aug 212 Sep 243 Oct 273 Nov 304 Dec 334 ] };