Why does Mongo store my date as a string?

Question

From Node.js I do

var startDate = new Date('2012-06-06');

Then I save it using mongodb native. It is stored as follows

'2012-06-05T14:00:00.000Z'

Answer 1

MongoDB stores dates in UTC and not as strings. Check the BSON specs.

Answer 2

What you see is the JSON representation of a date: new Date('2012-06-06').toJSON();

Answer 3

It's just how Dates will be displayed. (I thinks it is some kind of ISO standard code.) Internally it is save in a way more efficient way.