If you don't want to wait for Apple to release an update, you can try to follow these directions:

http://helw.net/blog/2011/04/28/updating-osx-for-egypts-dst-changes/

This post was written for an older release, so make sure you are getting the latest versions of both tzdata and ICU

http://www.iana.org/time-zones   (2013i)

http://www.opensource.apple.com/tarballs/ICU/  (511.25)

You *will* need to follow step 4a to compile it.

If anyone knows of any easier or more official way of updating OSX, please let me know.  It sure would be nice if they just had a tzdata package to update like most Linux distros.

> To: tz@iana.org
> Date: Fri, 3 Jan 2014 16:56:38 +0200
> From: tzdb@time.is
> Subject: Re: [tz] Timezones in Jordan
> 
> Looks like Apple hasn't caught up with this. I'm running OS X Mavericks 
> with the latest updates, and it has Jordan at UTC+3.
> 
> I'm sure Apple will release an update soon. Until then you could change 
> your time zone to for instance Istanbul.
> 
> (Sorry if this reply gets double-posted. I sent this message hours ago, 
> but it still hasn't appeared on the list, so I presume it got lost 
> somewhere.)
> 
> Sincerely,
> Even Scharning
> Time.is - exact time for any place on earth
> http://time.is/
> 
> On 2014-01-03 11:00, Paul Eggert wrote:
> > Michael Gardiner wrote:
> >
> >> I have had a look at TZDATA2013i and it had the time as UTC +2 which 
> >> should
> >> give us the correct time.
> >
> > NTP uses UTC, not local time, so the problem most likely is in the
> > settings of your NTP clients. Either they're not configured to
> > use tzdata's Jordan time (TZ='Asia/Amman', in TZ lingo), or
> > they're using an older version of the tz data.
>