Author: Mark Johnson
MDL-79007 calendar: Make screen readers read the new month name
http://git.moodle.org/gw?p=moodle.git;a=commit;h=be192b5b27c15cc73324ebeb37dfe0aabf5712b6
http://github.com/moodle/moodle/commit/be192b5b27c15cc73324ebeb37dfe0aabf5712b6
+ 4.2 en [newmonthannouncement,core_calendar]