JSFiddle - React, Tailwind, and code Playground

JavaScript

var newdate = new Date();
    newdate.setDate(newdate.getDate()+252);   // 36 week * 7 day = 252
    alert(newdate.getFullYear() + "-" + (newdate.getMonth() + 1) + "-" + newdate.getDate());  // alert(newdate);