Customize hours per day

[yarinl3]

Describe the current limitation
In the current state you can choose days in the preferences and choose hours per day (for all days).

Describe the proposed feature or enhancement
Add option to choose hours per day for every day.
For example for days: Sun, Tue, Thu set hours-per-day to 10:15 and for Mon, Wed set hours-per-day to 11:45.