Implement it in C++.

The project descriptions are quite general, the way they are executed, designed, and refined in detail is left to you. Remember that the more technical aspects of object-oriented programming (classes, virtual methods, inheritance, abstract classes, operator overloading, constructors, destructors, etc.) you include in your project, the better.

The classes should contain methods allowing to read/set the value of individual fields (day, month, year, hour, minute, etc.), printing and reading in the appropriate format, comparing objects (earlier, later), shifting by a specified number of days, minutes, etc.