A simple software update from the central repositories using your distribution's or operating system's software management tools should do the trick if that is an option.
Such tools include, for instance: Additionally, Free BSD, Slackware Linux, and other free UNIX-like operating systems have their own tools for the same tasks.
This may lead to problems, for some companies, as they scramble to alter their IT networks so scheduled software and clocks will remain accurate after the change or, worse, as some of them do not think to make any changes at all.
Most users of Microsoft Windows, Linux, and other operating systems will need to ensure that their computers are compliant with local Daylight Saving Time schedules.
I'm trying to update my timezone database, on Cent OS, the database located at /usr/share/zoneinfo.