默认的短消息列表的发送时间无法理解调整为中文，打开/engine/modules/pm.php大概1051行

		$pmlist .= "<tr><td><span class=\"{$class}\"><img src=\"{$icon}\" alt=\"\" /></span></td><td class=\"pm_list pm_subj\">{$subj}</td><td class=\"pm_list pm_from\">{$user_from}</td><td class=\"pm_list pm_date\" align=\"center\">" . langdate( "j.m.Y H:i", $row['date'] ) . "</td><td class=\"pm_list pm_checkbox\" align=\"center\"><input name=\"selected_pm[]\" value=\"{$row['id']}\" type=\"checkbox\" /></td></tr>";

修改为以

$pmlist .= "<tr><td><span class=\"{$class}\"><img src=\"{$icon}\" alt=\"\" /></span></td><td class=\"pm_list pm_subj\">{$subj}</td><td class=\"pm_list pm_from\">{$user_from}</td><td class=\"pm_list pm_date\" align=\"center\">" . langdate( "Y年n月d日H时m分s秒", $row['date'] ) . "</td><td class=\"pm_list pm_checkbox\" align=\"center\"><input name=\"selected_pm[]\" value=\"{$row['id']}\" type=\"checkbox\" /></td></tr>";