Help with making conditional formatting temporary

Hello everyone, I am trying to create a sheet with all of the employees schedules. Basically if on Monday employee 1 needs to be available, I would need the available cell to highlight green and so on. However, the function I have only applies to times of the day, but does not apply to the day of the week. For example, employee 2 has off on tuesday; therefore, the conditional formatting that applied on Monday, should not apply on tuesday for him. Any help on how I can make this work?

Here I attach the sheet.

Thanks for the answer. The formula of the conditional formatting is this one =and(O19=O19,MOD(NOW(),1)>=O19,MOD(NOW(),1)<=P19)

I tried the formula, but it seems is not working. Do you think we may use the IF function together with the AND?? for example, IF today is Monday execute this "the conditional format"