Developer credits
Git commits in Moodle 3.5.2 by Henning Bostelmann
commit f5d6dcfd062cc1a52526956fbb6fd83f5becd9bf Author: Henning Bostelmann <henning.bostelmann@york.ac.uk> Date: Sat, 14 Jul 2018 01:25:28 +0800 Tag: v3.5.2 MDL-62914 Calendar: handle TZURL iCal property