Firewall schedules GUI needs to be redone from scratch
That thing is seriously horrible, the calendar is confusing like hell plus mostly useless - never heard of anyone scheduling anything on a particular date (as opposed to recurring schedule), and now the time ranges are read-only to make things worse.
Badly needs a civilized intuitive workflow. Example from UniFi controller:
(Could live without the sliders, but the concept is what most people need. Not to click in a calendar.)