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);

score 15 · Accepted Answer · answered Jun 29 '10 at 15:24

15

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

will output:

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

answered Jun 29 '10 at 15:24

Phil Lamb

@Aaron: The `±HH:mm` format, including a `:`, is legal in ISO8601. – LukeH Jun 29 '10 at 15:37

score 2 · Answer 2 · answered Jun 29 '10 at 16:17

2

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

answered Jun 29 '10 at 16:17

Mark Dykun

score 1 · Answer 3 · answered Jun 29 '10 at 15:28

1

I would go with ISO format.

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

These are international standards.

answered Jun 29 '10 at 15:28

Will Marcouiller

that would probably be better but I'm trying to pass the date back and forth from objective-c. – Aaron Jun 29 '10 at 15:31

Adam Houldsworth · Answer 4 · 2010-06-29T15:29:25.740

0

I think that is shown in the hours. That -4 is the difference from GMT.

Oh I see, sorry misunderstood the question.

edited Jun 29 '10 at 15:29

answered Jun 29 '10 at 15:23

Adam Houldsworth

score 0 · Answer 5 · answered Jun 29 '10 at 15:25

0

You want to use DateTimeOffset.

answered Jun 29 '10 at 15:25

DarthVader

score 0 · Answer 6 · answered Jun 29 '10 at 15:29

0

How would you format DateTime in international format?

You can use a custom format specifier (there is no standard formats for ISO standard date/time formats).

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

Parse using one of DateTimeOffset's static methods, and then check the Offset property.

Or if you mean, how to include the offset in the string: use DateTimeOffset with the correct timezone and a custom format specifier.

answered Jun 29 '10 at 15:29

Richard

https://learn.microsoft.com/en-us/dotnet/standard/base-types/standard-date-and-time-format-strings#the-sortable-s-format-specifier as per Mark Dykun's answer below this works – AussieALF Jul 12 '18 at 04:54

6 Answers6