Author: Tim Hunt
MDL-28012 Quiz editing status line can display screwy dates.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c5da295b8516e7c556caa5118723815afb2ca9dd
http://github.com/moodle/moodle/commit/c5da295b8516e7c556caa5118723815afb2ca9dd
+ 2.1 en [quizisclosedwillopen,mod_quiz]