Holidays (Exercise)

using System;
using System.Collections.Generic;

namespace DateThing
{
    class Dates
    {
        static void Main()
        {
            var holidays = new List<DateTime>()
                               {
                                   new DateTime(2014,01,01),
                                   new DateTime(2014,03,03),
                                   new DateTime(2014,04,18),
                                   new DateTime(2014,04,19),
                                   new DateTime(2014,04,20),
                                   new DateTime(2014,05,01),
                                   new DateTime(2014,05,06),
                                   new DateTime(2014,05,02),
                                   new DateTime(2014,05,05),
                                   new DateTime(2014,05,24),
                                   new DateTime(2014,09,06),
                                   new DateTime(2014,09,22),
                                   new DateTime(2014,11,01),
                                   new DateTime(2014,12,24),
                                   new DateTime(2014,12,25),
                                   new DateTime(2014,12,26),
                                   new DateTime(2014,12,31),
                               };

            var workingSaturdays = new List<DateTime>()
            {
                new DateTime(2014, 05, 10),
                new DateTime(2014, 05, 31),
                new DateTime(2014, 12, 13),

            };
            Console.Write("From: ");
            string firstDate = Console.ReadLine();
            DateTime start = Convert.ToDateTime(firstDate);
            Console.Write("To: ");
            string finalDate = Console.ReadLine();
            DateTime toDate = Convert.ToDateTime(finalDate);
            int workingdayscount = 0;
            int nonworkingdayscount = 0;
            List<DateTime> nonworkingdayslist = new List<DateTime>();

            for (DateTime i = start; i <= toDate ; i=i.AddDays(1) )
            {
                if (i.DayOfWeek == DayOfWeek.Saturday && workingSaturdays.Contains(i))
                {
                    workingdayscount++;
                }
                else if (i.DayOfWeek != DayOfWeek.Sunday && i.DayOfWeek != DayOfWeek.Saturday &&
                    holidays.Contains(i))
                {
                    nonworkingdayscount++;
                    nonworkingdayslist.Add(i);
                }
                else if (i.DayOfWeek == DayOfWeek.Sunday || i.DayOfWeek == DayOfWeek.Saturday)
                {
                    nonworkingdayscount++;
                    nonworkingdayslist.Add(i);
                }
                else
                {
                    workingdayscount++;
                }

            }

            Console.WriteLine("From {0} to {1}:",start.ToString("d"),toDate.ToString("d"));
            Console.WriteLine("Working days = {0}",workingdayscount);
            Console.WriteLine("Non-working days = {0}",nonworkingdayscount);

            Console.WriteLine("\nHolidays:");
            foreach (var holiday in nonworkingdayslist)
            {
               Console.WriteLine(holiday.ToString("d"));
            }

            Console.ReadKey();
        }

    }
}