4
it seems that you used old language file for your newbb.
check if you have following items in newbb/language/main.php
// !!IMPORTANT!! insert '' to any char among reserved chars: "a", "A","B","c","d","D","F","g","G","h","H","i","I","j","l","L","m","M","n","O","r","s","S","t","T","U","w","W","Y","y","z","Z"
// insert additional '' to 't', 'r', 'n'
define("_MD_TODAY", "Today G:i:s");
define("_MD_YESTERDAY", "Yes\te\rday G:i:s");
define("_MD_MONTHDAY", "n/j G:i:s");
define("_MD_YEARMONTHDAY", "Y/n/j G:i");
