Node.js/Mongoose: get Objects by Date?

I want to build a http://producthunt.com clone with node.js. The links are stored in MongoDB (I use mongoose).

Now I want to write a method, which gets a date and outputs all objects, created on that Date. The Date is in the following format: "created" : ISODate("2014-07-15T13:01:31.748Z")

I don't know how to handle with this format. I really tried a lot. I don't want you to make my job. Here is an example for the code for requesting any links.

    Link
    .find()
    .exec(function(err, data) {
        if (err)
            res.send(err);
    res.json(data);

For example I made it work that I "find" all Links, and just pick the link of the requested day. But I want to build that mongoose handles these Date, but it seems that it is not supported by this Date-Format. Something like that:

    var requestedDate = req.params.date;

    Link
    .find({created: requestedDate})
    .exec(function(err, data) {
        if (err)
            res.send(err);
        res.json(data); 

    });

I think the problem is that I don't need a Date, but a Date-range.