using System;

public static class ExtentionMethods
{
    public static string GetDayName(this TimeSpan time)
    {
        switch (time.Days % 7)
        {
            case 0:
                return "Sunday";
            case 1:
                return "Monday";
            case 2:
                return "Tuesday";
            case 3:
                return "Wednesday";
            case 4:
                return "Thursday";
            case 5:
                return "Friday";
            case 6:
                return "Saturday";
        }
        return "ooops";
    }
}