Start from the weekly hours
Ida's Working hours schedule runs Monday to Friday, 09:00 to 17:00. Under it, she clicks Add an override.
Pick a date and give it other hours
She picks Friday 20 November and moves the end time to 12:00. For that date, those hours replace her weekly ones.
Or take the day off
For Thursday 26 November she turns on Mark unavailable (All day). Nobody can book her that day.
Every change in one list
Both dates sit under Date overrides with their hours, ready to edit or delete. Once a date has passed, its override is archived on its own.
Reilly sees the new hours
On Ida's booking page the 26th is greyed out and Friday the 20th offers times up to 11:30 only. Every other day keeps its 09:00 to 17:00.

