Date Formatting C#

Question

I am having an issue converting this date format into another format. I was hoping that somebody on here would be able to help me out.

Here is my code:

string fromFormat = "ddd, dd MM yyyy HH:mm:ss zzz"; 
string toFormat = "yyyy-MM-dd";

DateTime newDate = DateTime.ParseExact("Mon, 25 03 2013 00:00:00 GMT", fromFormat, null);

Console.WriteLine(newDate.ToString(toFormat));

-------EDIT--------

I was able to get rid of my errors by changing the day from 22 to 25. My new issue is trying to get the timezone to convert from GMT to EST. Would anyone have any ideas?

-------EDIT #2-------

Here is my current code as it stands. I am still having issues with a timezone conversion.

var date = "Mon, 25 03 2013 00:00:00 GMT";

// Cuts off "GMT" portion of string
string newdate = date.Substring(0, 24);

// Switches the output of date
string fromFormat = "ddd, dd MM yyyy HH:mm:ss";
string toFormat = "yyyy-MM-dd";

DateTime newDate = DateTime.ParseExact(newdate, fromFormat, null);
string finaldate = newDate.ToString(toFormat);

// Output final date
Console.WriteLine(finaldate);

-------EDIT #3-------

The code:

var input = "Mon, 25 03 2013 00:00:00 GMT";
var inner = input.Substring(0, 24);
var format = "ddd, dd MM yyyy HH:mm:ss";
var zoneId = "Eastern Standard Time";

var parsed = DateTime.ParseExact(inner, format, CultureInfo.InvariantCulture);

var utcDateTime = DateTime.SpecifyKind(parsed, DateTimeKind.Utc);
var eastern = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(utcDateTime, zoneId);


Console.WriteLine(eastern);

The error:

Unhandled Exception: System.TimeZoneNotFoundException: Exception of type
   'System.TimeZoneNotFoundException' was thrown.
at System.TimeZoneInfo.FindSystemTimeZoneByFileName (System.String id, System.String
   filepath) [0x00000] in :0 
at System.TimeZoneInfo.FindSystemTimeZoneById (System.String id) [0x00000] in :0 
at System.TimeZoneInfo.ConvertTimeBySystemTimeZoneId (DateTime dateTime, System.String 
   destinationTimeZoneId) [0x00000] in :0 
at Program.Main () [0x00000] in :0 

Any help would be much appreciated! Thanks!

-------FINAL EDIT-------

This is what ended up changing the timezone and converting to the format that I needed. Special thanks to @MattJohnson for all of his help!

// Cuts off 'GMT' portion of string
var newdate = date.Substring(0, 24);

var fromFormat = "ddd, dd MM yyyy HH:mm:ss";
var toFormat = "yyyy-MM-dd";
var zoneId = "Eastern Standard Time";


var parsed = DateTime.ParseExact(newdate, fromFormat, CultureInfo.InvariantCulture);

// Specifies UTC time and converts it to EST timezone
var utcDateTime = DateTime.SpecifyKind(parsed, DateTimeKind.Utc);
var eastern = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(utcDateTime, zoneId);

// Converts date to final format needed
var finaldate = eastern.ToString(toFormat);

Answer 1

string fromFormat = "ddd, dd MM yyyy HH:mm:ss zzz"; 
string toFormat = "yyyy-MM-dd";

DateTime newDate = DateTime.ParseExact("Mon, 22 03 2013 00:00:00 +00:00", fromFormat, null);

Console.WriteLine(newDate.ToString(toFormat));