Any formula to calculate a specific date and time?


I am currently creating a Calendar view where I place my tasks based on a date that is calculated from different attributes. It works successfully both if I use the DATE or DATEVALUE formulas. However, I’d need to place those tasks in my calendar at SPECIFIC TIMES and I’ve not found any way to to this. Is it possible? I’d like that, as a result of a calculation, I could place items not only on a certain day in the calendar but also at a specific time.