using System;

public class Program

{

    public static void Main()

    {

        var baseDate = new DateTime(1970, 1, 1);

        for(int i = 0; i < 31; i++)

        {

            var date = baseDate.AddDays(i);

            string suffix = date.Day switch

            {

                1 or 21 or 31 => "st",

                2 or 22 => "nd",

                3 or 23 => "rd",

                _ => "th",

            };

            Console.WriteLine(date.ToString($"d'{suffix}' MMMM - d{suffix} MMMM") );

        }

    }

}