JSFiddle - React, Tailwind, and code Playground
JavaScript
var str = '[Feb 6, 2013]',
userDate = new Date(str.match(/^\[(\w{3})\s(\d+),\s(\d{4})\]$/).slice(1).join(' ')),
isFuture = new Date < userDate;
console.log(isFuture);
document.body.textContent = 'Is ' + userDate + ' in the future? ' + (isFuture ? 'Yes' : 'No') + '.';