NearlyUnique

var queryDate = function (diff) {
    diff = diff || {};
    var d = new Date();
    d.setUTCFullYear(d.getUTCFullYear() + (diff.year||0));
    d.setUTCMonth(d.getUTCMonth() + (diff.month||0));
    d.setUTCDate(d.getUTCDate() + (diff.day||0));
    d.setUTCHours(d.getUTCHours() + (diff.hour||0));
    d.setUTCMinutes(d.getUTCMinutes() + (diff.min||0));
    return d;
};