using System;

public class Program

{

    public static void Main()

    {

int startHour = 18;

        int endHour = 6;

        DateTime startDate = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day,  startHour, 0 , 0);

        DateTime endDate = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day,  endHour, 0 , 0);

        DateTime CurrentTime = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day,  19, 0 , 0);

        Console.WriteLine("Current Time: " + CurrentTime.ToString());

        if (endHour <= startHour)

        {

            if(CurrentTime <= startDate)

            {

            startDate = startDate.AddDays(-1);

            }

            else{

                endDate = endDate.AddDays(1);

            }

        }

                Console.WriteLine("Start Date: " + startDate.ToString());

        Console.WriteLine("End Date: " + endDate.ToString());

        if(CurrentTime >= startDate && CurrentTime <= endDate){

            Console.WriteLine("Currently between active hours");

        }

        else

        {

            Console.WriteLine("Not currently between active hours");

        }

​

    }

}