using System;

public class Program

{

    public static void Main()

    {

        // Change this

        int months = 3;

        DateTime utcNow = DateTime.SpecifyKind(DateTime.Now, DateTimeKind.Utc);

        TimeZoneInfo cstZone = TimeZoneInfo.FindSystemTimeZoneById("New Zealand Standard Time");

        DateTime nzstNow = TimeZoneInfo.ConvertTimeFromUtc(utcNow, cstZone);

        DateTime dateListedTo = nzstNow.AddDays(-60);

        DateTime dateListedFrom = dateListedTo.AddMonths(months * -1);      

        string dateTimeFormat = "yyy-MM-dd";

        Console.WriteLine("Date listed to: " + dateListedTo.ToString(dateTimeFormat));

        Console.WriteLine("Date listed from: " + dateListedFrom.ToString(dateTimeFormat));

        Console.WriteLine("Sale date till: " + nzstNow.ToString(dateTimeFormat));

    }

}