Recently I was struggled with a customer incident and finally I realized that I didn’t understand the Edm.DateTime quite clearly. So I spend some time to do research on it to fix my knowledge gap. I list my learning here in case any other guy needs it as well.

For my study, I use this field in my application for example.

Why is there difference between them?

And when I type “alert(new Date(1443830400000));” in chrome console, I get this popuActually it ( 2015-10-03 08:00:00 GMT +0800 ) points to exactly the same time as 2015-10-03 00:00:00 UTC.

So how could the date with format /Date(1443830400000)/ be consumed in my application?

It makes sense to start debugging via the framework handler when the response of odata request ( Opportunity re-read after closing date is changed ) is successfully returned:

The aim is to figure out how framework parses this /Date(1443744000000)/.

Then I reached the place:

(1) there is a regular expression which extracts the number 1443744000000 from the input string.

(2) a local time is returned by new Date(), with the number parsed by previous step passed in. The local time is returned based on current Time zone configured in my laptop.

Then the local time returned by framework will be passed into my formatter so now I could do any formatting based on customer requirement:

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