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راهنمایی کید ،ارور هایی این مضمون در نشان دادن تاریخ !!!!!!

Warning: strtotime() [function.strtotime]: 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 'Asia/Tehran' for 'IRST/3.0/no DST' instead in /var/www/uob.ir/html/libraries/joomla/utilities/date.php on line 56

Warning: date() [function.date]: 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 'Asia/Tehran' for 'IRST/3.0/no DST' instead in /var/www/uob.ir/html/libraries/joomla/utilities/date.php on line 198

Warning: date() [function.date]: 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 'Asia/Tehran' for 'IRST/3.0/no DST' instead in /var/www/uob.ir/html/libraries/joomla/utilities/date.php on line 198
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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 'Asia/Tehran' for 'IRST/3.0/no DST' instead in /var/www/uob.ir/html/libraries/joomla/utilities/date.php on line 117

Warning: date() [function.date]: 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 'Asia/Tehran' for 'IRST/3.0/no DST' instead in /var/www/uob.ir/html/libraries/joomla/utilities/date.php on line 245

Warning: date() [function.date]: 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 'Asia/Tehran' for 'IRST/3.0/no DST' instead in /var/www/uob.ir/html/libraries/joomla/utilities/date.php on line 249

Warning: strftime() [function.strftime]: 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 'Asia/Tehran' for 'IRST/3.0/no DST' instead in /var/www/uob.ir/html/libraries/joomla/utilities/date.php on line 250