Problem with SRCMS Website

Hello My problen is when i add a news i get this bug :S.

Strict Standards: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'UTC' for '-4.5/no DST' instead in C:\AppServ\www\module\news.php on line 34

who can help me with it? :/