Do a search in your files for "all_times_are_gmt_x_time_now_is_y" and you will see that it is parsed in the functions.php file, around line 4921. So, you need to do something similar for your own variable.
Line 4921:
PHP Code:
$vbphrase['all_times_are_gmt_x_time_now_is_y'] = construct_phrase($vbphrase['all_times_are_gmt_x_time_now_is_y'], $tzoffset, $timenow, $datenow);