C#: Get the first day of the current year and first of a year against a given date

C# Sharp DateTime : Exercise-46 with Solution

Write a program in C# Sharp to get the first day of a year against a date.

C# Sharp Code:

using System;

class dttimeex46
{
    static void Main()
    {
        int dt, mn, yr;

        // Displaying the purpose of the program to the user.
        Console.Write("\n\n Find  the first day of a year against a date :\n");
        Console.Write("---------------------------------------------------\n");

        // Display the first day of the current year.
        Console.WriteLine(" The First day of the current year is : {0} \n", FirstDayOfYear().ToString("dd/MM/yyyy"));

        // Inputting a custom date from the user.
        Console.Write(" Input the Day : ");
        dt = Convert.ToInt32(Console.ReadLine());
        Console.Write(" Input the Month : ");
        mn = Convert.ToInt32(Console.ReadLine());
        Console.Write(" Input the Year : ");
        yr = Convert.ToInt32(Console.ReadLine());

        // Creating a DateTime object with the provided day, month, and year.
        DateTime d = new DateTime(yr, mn, dt);
        Console.WriteLine(" The formatted Date is : {0}", d.ToString("dd/MM/yyyy"));

        // Finding the first day of the year for the provided date.
        DateTime nd = FirstDayOfYear(d);
        Console.WriteLine(" The First day of the year {0} is : {1}\n", yr, nd.ToString("dd/MM/yyyy"));
    }

    // Method to find the first day of the year for the current date.
    static DateTime FirstDayOfYear()
    {
        return FirstDayOfYear(DateTime.Today);
    }

    // Method to find the first day of the year for a given date.
    static DateTime FirstDayOfYear(DateTime y)
    {
        return new DateTime(y.Year, 1, 1);
    }
}

Sample Output:

 Find  the first day of a year against a date :                                                               
---------------------------------------------------                                                           
 The First day of the current year is : 01/01/2017                                                            
   
 Input the Day : 12                                                                                           
 Input the Month : 06                                                                                          
 Input the Year : 2017                                                                                        
 The formatted Date is : 12/06/2017                                                                           
 The First day of the year 2017 is : 01/01/2017 

Flowchart :

C# Sharp Code Editor:

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