Steps to reproduce:
1. Use a German browser
2. Wait until Tuesday, Wednesday, or Thursday
3. Try to schedule multiple events
Events are not scheduled as noted in an error message.
Events are scheduled.
Workaround (if any):
Set your browser (not Opencast!) to english.
introduced a local aware version of moment.js and configures it globally to use the browser's local. However, the scheduling part of Opencast assumes that weekday names are in english, which is no longer the case.