📅 clsDate – Comprehensive C++ Date Utility Class

clsDate is a powerful, high-level C++ library designed for sophisticated date management and time calculations. It provides an extensive set of tools for date manipulation, comparison, formatting, and calendar operations, demonstrating advanced Object-Oriented Programming (OOP) and manual logic implementation.

---

🛠 Features & Services

The library is organized into logical categories to handle all date-time requirements:

Category	Features
Date Creation	Current system date, from string "dd/mm/yyyy", from day/month/year, from day-of-year order.
Access & Modification	Get/Set Day, Month, and Year.
Date Analysis	Leap year check, days in month/year, day of the week, weekend & business day check, age in days.
Date Manipulation	Add/Subtract days, weeks, months, years, decades, centuries, and millennia.
Date Comparison	Less than, equal, greater than, precise difference in days.
Formatting & Display	Convert to string, custom formatting (dd/mm/yyyy), split & replace logic.
Calendar Display	Full monthly and yearly calendars printed to console.
Vacation & Work	Count vacation days, calculate vacation end date, days until end of month/year/week.

---

📊 Commonly Used Methods

⚙️ Creation & Access

clsDate(), clsDate(day, month, year), clsDate("dd/mm/yyyy"), Day(), Month(), Year(), setDay().

🔍 Analysis & Comparison

LeapYear(), Weekend(), BusinessDay(), AgeInDays(), Date1LessThanDate2(), Date1EqualDate2(), Date1AfterDate2().

🔄 Manipulation & Formatting

AddOneDayOnDate(), AddXDaysOnDate(), MulOneDayFromDate(), convertDateToString(), DateFormating().

🗓 Calendar & Vacation

MonthCalendar(), YearCalendar(), NumbersDaysOfVacation(), ReturnVacationDate().

---

💻 Example Usage

1️⃣ Basic Operations & Printing

clsDate today;
today.Print(); // Output: 21/12/2025

2️⃣ Handling Leap Years & Adding Days

clsDate myDate(28, 2, 2024); // Leap Year
myDate.AddXDaysOnDate(3);
cout << myDate.DateFormating(); // Output: 2/3/2024

3️⃣ Difference Between Dates

clsDate start(1, 1, 2025);
clsDate end(10, 1, 2025);
cout << start.DiffDaysBetweenDate1AndDate2(end); // Output: 9

4️⃣ Calendar & Vacation Logic

clsDate vacationStart(20, 12, 2025);
// Calculate return date after 10 business days
clsDate vacationEnd = clsDate::ReturnVacationDate(vacationStart, 10);
cout << vacationEnd.DateFormating(); // Output: 2/1/2026

// Print monthly calendar
vacationStart.MonthCalendar();

---

🎯 Project Purpose

• The main goal of this project is hands-on practice and demonstrating:

• Full OOP Implementation: Mastering objects, static methods, encapsulation, and class relationships.

• Advanced Manual Logic: Implementing leap years, month-end detection, and date differences without external libraries.

• Problem-Solving: Handling complex time intervals and edge cases.

---

📜 License

This project is provided for educational and experimental purposes only.