Author: Stephen Bourget
MDl-47104 Calendar: Make 'calendar_lookahead' more flexible
http://git.moodle.org/gw?p=moodle.git;a=commit;h=5bc12ca26557a92d32cbd2635c9f3cff0cfa1e46
http://github.com/moodle/moodle/commit/5bc12ca26557a92d32cbd2635c9f3cff0cfa1e46
+ 2.9 en [numday,core]
+ 2.9 en [nummonth,core]
+ 2.9 en [numweek,core]
+ 2.9 en [numyear,core]