$(document).ready(function(){
            $('#demo1-1').datetimepicker({
                date: new Date(),
                viewMode: 'YMD',
                //date selection event
                onDateChange: function() {
                    console.log(this.getValue());
                }
            });
});

function font(){
        var hSize = $('.one-header').css('font-size');
        var dSize = $('.one-date').css('font-size');
        if(hSize == '36px' && dSize == '26px'){
           hSize = '20';
           dSize = '10';
           tSize = '12';
           $('.one-header').css('font-size', hSize+'px');
           $('.one-date').css('font-size', dSize+'px');
           $('.size-text *').css('font-size', tSize+'pt');
        }else{
           $('.one-header').css('font-size', '36px');
           $('.one-date').css('font-size', '26px');
           $('.size-text *').css('font-size', '28pt');
        }
}