How would you format DateTime in international format?

Question

The international string representation format is (YYYY-MM-DD HH:MM:SS ±HHMM).

e.g. 2010-06-10 21:21:10 -0400

basically the problem I am having is figuring out how to get the difference from GMT.

DateTime dt = new DateTime(2008, 3, 9, 16, 5, 7, 123);
String.Format("{0:yyyy-MM-dd HH:mm:ss ????}", dt);

Answer 1

DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss zzz");

will output:

2010-06-29 08:25:16 -07:00

Answer 2

string isoFormat = inputDateTime.Format("s");

Answer 3

I would go with ISO format.

And the W3C has also a note on the topic: Date and Time Formats.

These are international standards.