diff --git a/95_Weekday/csharp/Program.cs b/95_Weekday/csharp/Program.cs
new file mode 100644
index 00000000..d2e531bc
--- /dev/null
+++ b/95_Weekday/csharp/Program.cs
@@ -0,0 +1,203 @@
+using System.Text;
+
+namespace Weekday
+{
+    class Weekday
+    {
+        private void DisplayIntro()
+        {
+            Console.WriteLine("");
+            Console.WriteLine("SYNONYM".PadLeft(23));
+            Console.WriteLine("CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY");
+            Console.WriteLine("");
+            Console.WriteLine("Weekday is a computer demonstration that");
+            Console.WriteLine("gives facts about a date of interest to you.");
+            Console.WriteLine("");
+        }
+
+        private bool ValidateDate(string InputDate, out DateTime ReturnDate)
+        {
+            // The expectation is that the input is in the format D,M,Y
+            // but any valid date format (other than with commas) will work
+            string DateString = InputDate.Replace(",", "/");
+
+            return (DateTime.TryParse(DateString, out ReturnDate));
+        }
+
+        private DateTime PromptForADate(string Prompt)
+        {
+            bool Success = false;
+            string LineInput = String.Empty;
+            DateTime TodaysDate = DateTime.MinValue;
+
+            // Get the date for input and validate it
+            while (!Success)
+            {
+                Console.Write(Prompt);
+                LineInput = Console.ReadLine().Trim().ToLower();
+
+                Success = ValidateDate(LineInput, out TodaysDate);
+
+                if (!Success)
+                {
+                    Console.WriteLine("*** Invalid date.  Please try again.");
+                    Console.WriteLine("");
+                }
+            }
+
+            return TodaysDate;
+        }
+
+        private void CalculateDateDiff(DateTime TodaysDate, DateTime BirthDate, Double Factor, out int AgeInYears, out int AgeInMonths, out int AgeInDays)
+        {
+            // leveraged Stack Overflow answer: https://stackoverflow.com/a/3055445
+
+            // Convert to number of days since Birth Date, multiple by factor then store as new FactorDate
+            TimeSpan TimeDiff = TodaysDate.Subtract(BirthDate);
+            Double NumberOfDays = TimeDiff.Days * Factor;
+            DateTime FactorDate = BirthDate.AddDays(NumberOfDays);
+
+            // Compute difference between FactorDate (which is TodaysDate * Factor) and BirthDate
+            AgeInMonths = FactorDate.Month - BirthDate.Month;
+            AgeInYears = FactorDate.Year - BirthDate.Year;
+
+            if (FactorDate.Day < BirthDate.Day)
+            {
+                AgeInMonths--;
+            }
+
+            if (AgeInMonths < 0)
+            {
+                AgeInYears--;
+                AgeInMonths += 12;
+            }
+
+            AgeInDays = (FactorDate - BirthDate.AddMonths((AgeInYears * 12) + AgeInMonths)).Days;
+
+        }
+
+        private void WriteColumnOutput(string Message, int Years, int Months, int Days)
+        {
+
+            Console.WriteLine("{0,-25} {1,-10:N0} {2,-10:N0} {3,-10:N0}", Message, Years, Months, Days);
+
+        }
+
+        private void DisplayOutput(DateTime TodaysDate, DateTime BirthDate)
+        {
+            Console.WriteLine("");
+
+            // Not allowed to play if the current year is before 1582
+            if (TodaysDate.Year < 1582)
+            {
+                Console.WriteLine("Not prepared to give day of week prior to MDLXXXII.");
+                return;
+            }
+
+            // Share which day of the week the BirthDate was on
+            Console.Write(" {0} ", BirthDate.ToString("d"));
+
+            string DateVerb = "";
+            if (BirthDate.CompareTo(TodaysDate) < 0)
+            {
+                DateVerb = "was a ";
+            }
+            else if (BirthDate.CompareTo(TodaysDate) == 0)
+            {
+                DateVerb = "is a ";
+            }
+            else
+            {
+                DateVerb = "will be a ";
+            }
+            Console.Write("{0}", DateVerb);
+
+            // Special warning if their birth date was on a Friday the 13th!
+            if (BirthDate.DayOfWeek.ToString().Equals("Friday") && BirthDate.Day == 13)
+            {
+                Console.WriteLine("{0} the Thirteenth---BEWARE", BirthDate.DayOfWeek.ToString());
+            }
+            else
+            {
+                Console.WriteLine("{0}", BirthDate.DayOfWeek.ToString());
+            }
+
+            // If today's date is the same month & day as the birth date then wish them a happy birthday!
+            if (BirthDate.Month == TodaysDate.Month && BirthDate.Day == TodaysDate.Day)
+            {
+                Console.WriteLine("");
+                Console.Write("***Happy Birthday***");
+            }
+
+            Console.WriteLine("");
+
+            // Only show the date calculations if BirthDate is before TodaysDate
+            if (DateVerb.Trim().Equals("was a"))
+            {
+
+                Console.WriteLine("{0,-24} {1,-10} {2,-10} {3,-10}", " ", "Years", "Months", "Days");
+
+                int TheYears = 0, TheMonths = 0, TheDays = 0;
+                int FlexYears = 0, FlexMonths = 0, FlexDays = 0;
+
+                CalculateDateDiff(TodaysDate, BirthDate, 1, out TheYears, out TheMonths, out TheDays);
+                WriteColumnOutput("Your age if birthdate", TheYears, TheMonths, TheDays);
+
+                FlexYears = TheYears;
+                FlexMonths = TheMonths;
+                FlexDays = TheDays;
+                CalculateDateDiff(TodaysDate, BirthDate, .35, out FlexYears, out FlexMonths, out FlexDays);
+                WriteColumnOutput("You have slept", FlexYears, FlexMonths, FlexDays);
+
+                FlexYears = TheYears;
+                FlexMonths = TheMonths;
+                FlexDays = TheDays;
+                CalculateDateDiff(TodaysDate, BirthDate, .17, out FlexYears, out FlexMonths, out FlexDays);
+                WriteColumnOutput("You have eaten", FlexYears, FlexMonths, FlexDays);
+
+                FlexYears = TheYears;
+                FlexMonths = TheMonths;
+                FlexDays = TheDays;
+                CalculateDateDiff(TodaysDate, BirthDate, .23, out FlexYears, out FlexMonths, out FlexDays);
+                string FlexPhrase = "You have played";
+                if (TheYears > 3)
+                    FlexPhrase = "You have played/studied";
+                if (TheYears > 9)
+                    FlexPhrase = "You have worked/played";
+                WriteColumnOutput(FlexPhrase, FlexYears, FlexMonths, FlexDays);
+
+                FlexYears = TheYears;
+                FlexMonths = TheMonths;
+                FlexDays = TheDays;
+                CalculateDateDiff(TodaysDate, BirthDate, .25, out FlexYears, out FlexMonths, out FlexDays);
+                WriteColumnOutput("You have relaxed", FlexYears, FlexMonths, FlexDays);
+
+                Console.WriteLine("");
+                Console.WriteLine("* You may retire in {0} *".PadLeft(38), BirthDate.Year + 65);
+            }
+        }
+
+        public void PlayTheGame()
+        {
+            DateTime TodaysDate = DateTime.MinValue;
+            DateTime BirthDate = DateTime.MinValue;
+
+            DisplayIntro();
+
+            TodaysDate = PromptForADate("Enter today's date in the form: 3,24,1978  ? ");
+            BirthDate = PromptForADate("Enter day of birth (or other day of interest)? ");
+
+            DisplayOutput(TodaysDate, BirthDate);   
+
+        }
+    }
+    class Program
+    {
+        static void Main(string[] args)
+        {
+
+            new Weekday().PlayTheGame();
+
+        }
+    }
+}
\ No newline at end of file