Quick patch for KnockoutJS to handle date equality checks

ko-date.js

function wrapEqualityComparerWithDateSupport(origFn) {
    return function (a, b) {
        return origFn(a, b) ||
            (a instanceof Date && b instanceof Date && a.getTime() === b.getTime());
    }
}

ko.observable.fn.equalityComparer = wrapEqualityComparerWithDateSupport(ko.observable.fn.equalityComparer);
ko.dependentObservable.fn.equalityComparer = wrapEqualityComparerWithDateSupport(ko.dependentObservable.fn.equalityComparer);