Developer credits
Git commits in Moodle 2.4.0 by Brian Jorgensen
commit d2b46849464d37c61a7e25a6994150117ba05a3f Author: Brian Jorgensen <brian.jorgensen@ualberta.ca> Date: Wed, 04 Apr 2012 01:45:43 +0800 Tag: v2.4.0-beta MDL-32180 calendar - added developer hint for a missing or unreadable calendar hook file