Bu hatanın sebebi nedir?

Warning: mktime() [function.mktime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting 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 'America/New_York' for 'EDT/-4.0/DST' instead in /home/xxx/public_html/xxxxxxxxxxxxx.com/admin.php on line 124



Adı geçen 124. satır

if(@!$_GET){   $uptime = @exec('uptime'); preg_match("/averages?: ([0-9\.]+),[\s]+([0-9\.]+),[\s]+([0-9\.]+)/", $uptime, $avgs); $uptime = explode(' up ', $uptime); $uptime = explode(',', $uptime[1]); $uptime = $uptime[0] .', '. $uptime[1]; $start = mktime(0, 0, 0, 1, 1, date('Y'), 0); $end = mktime(0, 0, 0, date('m'), date('j'), date('y'), 0); $diff = $end - $start; $days = @($diff / 86400); $percentage = @($uptime / $days) * 100; $load = $avgs[1] + $avgs[2] + $avgs[3]; $load = $load / 3; $load = round($load, 3); $uptime=str_replace('days','gün',$uptime); echo "Server Load Değeri : ".$avgs[1]." - ".$avgs[2]." - ".$avgs[3]."<br>"; echo "Average : $load"; echo "<br>"; echo "Uptime : $uptime"; ECHO '<br><B><FONt COLOR="red">İstatistikler</font></B><br>'; echo $ist;  echo '<br>Oluşturulan Video Sitemaplar: <br>

--R10.NET; Flood Engellendi -->-> Yeni yazılan mesaj 17:09:46 -->-> Daha önceki mesaj 17:00:55 --

Sunucum sorunun çözümüne ulaştırdı teşekkürler.

date_default_timezone_set('Europe/Istanbul');

gibi bir fonksiyonla mı çözüme ulaştın?