Developer credits
Git commits in Moodle 3.6.x by Trisha Milan
commit 90b9c2e2d346af842314d906a6a816c46f538e38 Author: Trisha Milan <trishamilan@catalyst-au.net> Date: Thu, 11 Apr 2019 14:46:07 +0800 Tag: v3.6.7 MDL-65310 block_timeline: Hide activities without due date