using System;

public class Program

{

    public static void Main()

    {

                //Calculate day duration

                DateTime today = DateTime.Today;

                // The (... + 7) % 7 ensures we end up with a value in the range [0, 6]

                int daysUntilThursday = ((int)DayOfWeek.Thursday - (int)today.DayOfWeek + 7) % 7;

                string timeOutDay = daysUntilThursday.ToString();

​

                //Calculate time duration

                var timeUtc = DateTime.UtcNow;

                TimeZoneInfo easternZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");

                DateTime timeNow = TimeZoneInfo.ConvertTimeFromUtc(timeUtc, easternZone);

​

                var timeNowTimeSpan = new TimeSpan(timeNow.Hour, timeNow.Minute, timeNow.Second);

                //update this section to 630am and 1230pm, currently set at 630pm

                var timeoutTimeSpan = new TimeSpan(6, 30, 00);

​

                var duration = "";

​

                if (timeNowTimeSpan > timeoutTimeSpan)

                {

                    //if timenow is after duedate time subtract from end of day and add hours of time remaining in the day

                    timeNowTimeSpan = new TimeSpan(24, 00, 00) - timeNowTimeSpan + new TimeSpan(6, 30, 00);

                        //if timenow is after duedate time and it's not the day of due date time, then subtract one day.

                        if (Int32.Parse(timeOutDay) != 0)

                        {

                            int dayMinusOne = Int32.Parse(timeOutDay)-1;

                            timeOutDay = dayMinusOne.ToString();

                        }

                        //if timenow is after duedate time and it's same day of due date time, then add 6 days

                        else if (Int32.Parse(timeOutDay) == 0)

                        {

                            timeOutDay = "6";

                        }

                    duration = (timeNowTimeSpan).ToString();

                }

                else

                {

                    duration = (timeoutTimeSpan - timeNowTimeSpan).ToString();

                }

​

                Console.WriteLine(timeOutDay + ":" + duration);

    }

}