Each date change should trigger change event

[slavede]

Inside bindChangeEvent you are checking if date is invalid with checkDate and if so you return back without triggering change event even though you are changing date inside checkDate:

    checkDate: function (day, month, year) {
        var invalidDate;

        if (month !== '00') {
            var numDaysInMonth = (new Date(year, month, 0).getDate()),
                selectedDayInt = parseInt(day, 10);

            invalidDate = this.updateDayOptions(numDaysInMonth, selectedDayInt);

            // If the date is invalid, empty the hidden field to prevent invalid submissions
            if (invalidDate) {
                this.internals.objectRefs.hiddenField.val('');
            }
        }

        return invalidDate;
    }

We should add:

                    this.internals.objectRefs.hiddenField.change();

right after this.internals.objectRefs.hiddenField.val('');

OR

Add it inside bindChangeEvent just before return false.

            if (invalidDate) {
                objectRefs.dayDropdown.addClass('invalid');
                return false;
            }

This causes that in case you select December 31st and you switch to february, change event won't be triggered even though is invalid date. But I think it really should