Change timezone in Russia 26.10.14 in mac os x 10.9.5
If you want to check your system to change the time zone , you can run this command in terminal:

zdump -v /etc/localtime | grep 2014


If you see two lines:

/etc/localtime  Sat Oct 25 21:59:59 2014 UTC = Sun Oct 26 01:59:59 2014 MSK isdst=0
/etc/localtime  Sat Oct 25 22:00:00 2014 UTC = Sun Oct 26 01:00:00 2014 MSK isdst=0


Time zone will be changed automatically.


You can manually update time zones:
You can find time preferences on the Mac OS on the two files: /etc/localtime and /usr/share/icu/icudtXXX.dat.


Settings for console time are stored on the /etc/localtime.

For other programms - on the /usr/share/icu/icudtXXX.dat

Update /etc/localtime:

download last tzdata on the [iana][1]
extract: tar xzf ./tzdata2011l.tar.gz
apply: sudo zic europe
check: zdump -v /etc/localtime | grep 2014 


If all ok, you see something like this:

/etc/localtime  Sat Oct 25 21:59:59 2014 UTC = Sun Oct 26 01:59:59 2014 MSK isdst=0
/etc/localtime  Sat Oct 25 22:00:00 2014 UTC = Sun Oct 26 01:00:00 2014 MSK isdst=0


Update /usr/share/icu/icudtXXX.dat - you can compile icudtXXX.dat or download it.

Compile:

Download [source][2]
Extract: `tar xzf ICU-400.42.tar.gz &amp;&amp; cd ICU-400.42/icuSources`
Copy actual tzdata to the sources: `cp ~/tzdata2011l.tar.gz ./tools/tzcode/`
compile: `./runConfigureICU MacOSX --with-data-packaging=archive &amp;&amp; gmake`
Backup origin tzdata: `cp /usr/share/icu/icudt40l.dat ~`
Install new: `sudo install -o root -g wheel -m 0644 -Sp data/out/icudt40l.dat /usr/share/icu/icudt40l.dat`
reboot