isoDateTime should include timezone (or UTC)

[Krinkle]

Right now, using dateFormat isoDateTime produces:

 Date: 2014-06-27T00:37:07

Which is confusing because it applied my local time zone (UTC +02:00) but also left out any timezone indication. This is imho invalid ISO. It should use UTC and include a Z at the end, or include the indication for the timezone used.

[ctavan]

dateformat() doesn't really play well with timezones since the javascript Date() object itself doesn't really play well with timezones.

If you need to work with timezone-aware dates I suggest using a more sophisticated library such as moment.js.

Would that be a viable alternative for you? If not feel free to re-open this issue.