If Evolution is not installed, GNOME Calendar event reminders / alarms notifications popup or sounds will not work
2023 edit: to get sound and notifications in GNOME Calendar, you need Evolution to be installed, until this functionality is migrated to GNOME Shell and Evolution's GUI is no longer a requirement. See gnome-shell#155.
Original description:
Fedora 27, gnome-calendar 3.26.2
I am not getting any popup notifications from either calendars and furthermore the global notifications settings don't even show the calendar.
Evolution and Thunderbird are uninstalled , not sure if this could be the cause.
Steps to reproduce: add calendar event , set a reminder