Create EN_NGHolidayStrategy.cs

src/DateTimeExtensions/WorkingDays/CultureStrategies/EN_NGHolidayStrategy.cs

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+using System;
+using System.Collections.Generic;
+
+namespace DateTimeExtensions.Common
+{
+    // Base class for holidays
+    public class Holiday
+    {
+        public string Name { get; }
+        public DateTime Date { get; }
+
+        public Holiday(string name, DateTime date)
+        {
+            Name = name;
+            Date = date;
+        }
+    }
+
+    // Class for fixed holidays
+    public class FixedHoliday : Holiday
+    {
+        public FixedHoliday(string name, int month, int day) 
+            : base(name, new DateTime(DateTime.Now.Year, month, day))
+        {
+        }
+    }
+
+    // Class for relative holidays
+    public class RelativeHoliday : Holiday
+    {
+        public RelativeHoliday(string name, Holiday referenceHoliday, int offset) 
+            : base(name, referenceHoliday.Date.AddDays(offset))
+        {
+        }
+    }
+
+    // Class for Islamic holidays
+    public class IslamicHoliday : Holiday
+    {
+        public IslamicHoliday(string name) : base(name, CalculateIslamicHolidayDate(name)) { }
+
+        private static DateTime CalculateIslamicHolidayDate(string name)
+        {
+            // Placeholder for actual date calculation logic
+            return DateTime.Now; // Use appropriate logic to determine the date
+        }
+    }
+
+    public static class GlobalHolidays
+    {
+        public static Holiday EasterSunday { get; } = new FixedHoliday("Easter Sunday", 4, 9);
+        public static Holiday NewYear { get; } = new FixedHoliday("New Year's Day", 1, 1);
+    }
+
+    public abstract class HolidayStrategyBase
+    {
+        protected List<Holiday> InnerHolidays { get; } = new List<Holiday>();
+    }
+
+    public interface IHolidayStrategy
+    {
+    }
+
+    [AttributeUsage(AttributeTargets.Class)]
+    public class LocaleAttribute : Attribute
+    {
+        public LocaleAttribute(string locale) { }
+    }
+}
+
+namespace DateTimeExtensions.WorkingDays.CultureStrategies.NigerianHolidays
+{
+    using DateTimeExtensions.Common;
+
+    [Locale("en-NG")]
+    public class EN_NGHolidayStrategy : HolidayStrategyBase, IHolidayStrategy
+    {
+        public EN_NGHolidayStrategy()
+        {
+            // Adding holidays to the inner holidays list
+            this.InnerHolidays.Add(GlobalHolidays.NewYear);
+            this.InnerHolidays.Add(IndependenceDay);
+            this.InnerHolidays.Add(DemocracyDay);
+            this.InnerHolidays.Add(WorkersDay);
+            this.InnerHolidays.Add(ChristmasDay);
+            this.InnerHolidays.Add(BoxingDay);
+            this.InnerHolidays.Add(GoodFriday);
+            this.InnerHolidays.Add(EasterMonday);
+            this.InnerHolidays.Add(Maulid);
+            this.InnerHolidays.Add(EidAlFitr);
+            this.InnerHolidays.Add(EidAlAdha);
+        }
+
+        private static readonly Holiday independenceDay = new FixedHoliday("Independence Day", 10, 1);
+        public static Holiday IndependenceDay => independenceDay;
+
+        private static readonly Holiday democracyDay = new FixedHoliday("Democracy Day", 6, 12);
+        public static Holiday DemocracyDay => democracyDay;
+
+        private static readonly Holiday workersDay = new FixedHoliday("Workers' Day", 5, 1);
+        public static Holiday WorkersDay => workersDay;
+
+        private static readonly Holiday christmasDay = new FixedHoliday("Christmas Day", 12, 25);
+        public static Holiday ChristmasDay => christmasDay;
+
+        private static readonly Holiday boxingDay = new FixedHoliday("Boxing Day", 12, 26);
+        public static Holiday BoxingDay => boxingDay;
+
+        private static readonly Holiday goodFriday = new RelativeHoliday("Good Friday", GlobalHolidays.EasterSunday, -2);
+        public static Holiday GoodFriday => goodFriday;
+
+        private static readonly Holiday easterMonday = new RelativeHoliday("Easter Monday", GlobalHolidays.EasterSunday, 1);
+        public static Holiday EasterMonday => easterMonday;
+
+        private static readonly Holiday eidAlFitr = new IslamicHoliday("Eid al-Fitr");
+        public static Holiday EidAlFitr => eidAlFitr;
+
+        private static readonly Holiday eidAlAdha = new IslamicHoliday("Eid al-Adha");
+        public static Holiday EidAlAdha => eidAlAdha;
+
+        private static readonly Holiday maulid = new IslamicHoliday("Maulid an-Nabi");
+        public static Holiday Maulid => maulid;
+    }
+}
+
+namespace HolidayProgram
+{
+    using DateTimeExtensions.Common;
+    using DateTimeExtensions.WorkingDays.CultureStrategies.NigerianHolidays;
+
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            var holidayStrategy = new EN_NGHolidayStrategy();
+
+            Console.WriteLine("Nigerian Holidays:");
+            Console.WriteLine($"1. {EN_NGHolidayStrategy.IndependenceDay.Name} - {EN_NGHolidayStrategy.IndependenceDay.Date.ToShortDateString()}");
+            Console.WriteLine($"2. {EN_NGHolidayStrategy.DemocracyDay.Name} - {EN_NGHolidayStrategy.DemocracyDay.Date.ToShortDateString()}");
+            Console.WriteLine($"3. {EN_NGHolidayStrategy.WorkersDay.Name} - {EN_NGHolidayStrategy.WorkersDay.Date.ToShortDateString()}");
+            Console.WriteLine($"4. {EN_NGHolidayStrategy.ChristmasDay.Name} - {EN_NGHolidayStrategy.ChristmasDay.Date.ToShortDateString()}");
+            Console.WriteLine($"5. {EN_NGHolidayStrategy.BoxingDay.Name} - {EN_NGHolidayStrategy.BoxingDay.Date.ToShortDateString()}");
+            Console.WriteLine($"6. {EN_NGHolidayStrategy.GoodFriday.Name} - {EN_NGHolidayStrategy.GoodFriday.Date.ToShortDateString()}");
+            Console.WriteLine($"7. {EN_NGHolidayStrategy.EasterMonday.Name} - {EN_NGHolidayStrategy.EasterMonday.Date.ToShortDateString()}");
+            Console.WriteLine($"8. {EN_NGHolidayStrategy.EidAlFitr.Name} - {EN_NGHolidayStrategy.EidAlFitr.Date.ToShortDateString()}");
+            Console.WriteLine($"9. {EN_NGHolidayStrategy.EidAlAdha.Name} - {EN_NGHolidayStrategy.EidAlAdha.Date.ToShortDateString()}");
+            Console.WriteLine($"10. {EN_NGHolidayStrategy.Maulid.Name} - {EN_NGHolidayStrategy.Maulid.Date.ToShortDateString()}");
+
+            Console.ReadLine();
+        }
+    }
+}