After work with src people (special thanks to ru@ and dougb@), to update share/timezone to tzdata-2006n in CURRENT and MFC to RELENG_(4|5|6). I discovery that PHP 5 have a internal timezone structure.
Searching about that, i found pecl-timezonedb. After ports freeze i will add pecl-timezonedb in ports/misc.
If you need you can download shar
Update: Added misc/pecl-timezonedb in ports tree.