Option to mark day as holiday

[CrypticVader]

Feature Request

Is your feature request related to a problem? Please describe. Currently the app doesn't detect holidays according to vtop academic calendar and consider every monday to friday as working days. This leads the app to keep sending notifications even on holidays.

Describe the solution you'd like An option on main screen to mark day as non-working day, or perhaps the app can fetch the academic calendar from vtop and accordingly detect if there's any class that day.