How to change the date range picker's date format?

If you want to present a different format, you need to add a locale object after you run the daterangepicker function. The site doesn't currently have a list of all the formats it supports, but try this:

$(function() {
    $("#<%= txtName.ClientID %>").daterangepicker({
        locale: {
            format: 'DD/MMM/YYYY'
        }
    });
});

See here for more options: http://www.daterangepicker.com/#config

There was actually a bug related to wrong dates being selected.

Here are the details.

Updating to the latest version resolved the locale format bug for me.