How to add close text to datetimepicker bootstrap?

$(function() {
    $('input.month-mode').datetimepicker({
        viewMode: 'months',
        format: 'MM/YYYY',
        showClose: true,
        maxDate: current_month,
    });
});

I want to add close text to it. by default it shows 'X', but I want to change it. Is it possible?