using System;
using System.Globalization;
using System.Linq;
using System.Collections.Generic;

public class Test
{
    

	public static void Main()
	{
        DateTime start = new DateTime(2013, 1, 1);
        Random gen = new Random();
        int range = (DateTime.Today - start).Days;
        start.AddDays(gen.Next(range));
    
        int startHour = 14;
        int endHour = 23;
        int allQuarters = Enumerable.Range(0, (endHour - startHour) * 4).Count();
        TimeSpan time = TimeSpan.FromMinutes(gen.Next(allQuarters) * 15);
        start = start + TimeSpan.FromHours(startHour) + time;
        Console.WriteLine(start);
	}
}