date_default_timezone_set() function

Hi

I install the dolphin 7 in new server ( centOS 6 + Isp maneger and I have SSH access )

how can I fix this problem about time zone?   : http://trade.ru.euavanti.com/

help me please 

If you search the forum with the search link on the left you will find that most questions have been asked before... for example if you search for mktime you will find this beauty...

http://www.boonex.com/forums/?action=goto&search=1#topic/mktime-error-HELP-PLEASE-.htm