Simple command line date and time formatter for use in batch scripts.

dttm.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace dttm
{
    class Program
    {
        static int Main(string[] args)
        {
            // no arguments. write current local date and time in iso-8601 format
            if (args.Length == 0)
            {
                Console.WriteLine("Usage: dttm <format> <switches>");
                Console.WriteLine("Switches:");
                Console.WriteLine("  /utc         UTC output");
                Console.WriteLine("  /lowercase   Output is in lowercase");
                return 1;
            }

            var isUtc = args.Contains("/utc", StringComparer.InvariantCultureIgnoreCase);
            var isLowerCase = args.Contains("/lowercase", StringComparer.InvariantCultureIgnoreCase);

            var format = args[0];
            var date = isUtc ? DateTime.UtcNow : DateTime.Now;
            var output = date.ToString(format);

            if (isLowerCase)
                Console.WriteLine(output.ToLower());
            else
                Console.WriteLine(output);

            return 0;

        } // Main
    } // class
} // namespace