JSFiddle - React, Tailwind, and code Playground

HTML

<button class="decrease_date" type="button">Decrease</button>
<button class="increase_date" type="button">Increase</button>
<div class="display_date">
    
</div>

JavaScript

var currentDate = new Date();    
$('button').click(function() {
    var add = $(this).hasClass('increase_date') ? 1 : -1;
    currentDate.setDate(currentDate.getDate()+add);
    $('.display_date').html(currentDate);    
})