tablesort.date.js

// Forked from https://github.com/tristen/tablesort/blob/gh-pages/src/sorts/tablesort.date.js

// Basic dates in dd/mm/yy, dd-mm-yy or dd.mm.yy format.
// Years can be 4 digits. Days and Months can be 1 or 2 digits.
(function(){
    // Change $1/$2/$3 order to $2/$1/$3 to support dd/mm/yy format instead of mm/dd/yy
    var dateFormat = '$2/$1/$3';
    var parseDate  = function(date) {
        date = date.replace(/\-/g, '/');
        date = date.replace(/(\d{1,2})[\/\-.](\d{1,2})[\/\-.](\d{2})/, dateFormat); // format before getTime
        
        return new Date(date).getTime() || -1;
    };

    Tablesort.extend('date', function(item) {
        return (
                item.search(/(Mon|Tue|Wed|Thu|Fri|Sat|Sun)\.?,?\s*/i) !== -1 ||
                item.search(/\d{1,2}[\/\-.]\d{1,2}[\/\-.]\d{2,4}/) !== -1 ||
                item.search(/(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)/i) !== -1
            ) && !isNaN(parseDate(item));
    }, function(a, b) {
        a = a.toLowerCase();
        b = b.toLowerCase();

        return parseDate(b) - parseDate(a);
    });
}());