Convert CMS2021 schedule to local time

script.js

// ==UserScript==
// @name         Convert CMS2021 Schedule to Local Time
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Convert CMS2021 schedule to local time
// @author       David Baynard
// @match        https://cms21.io/agenda/
// @icon         https://www.google.com/s2/favicons?domain=cms21.io
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    const convertScheduleToLocalTime = () =>
      // Find schedule
      [...document.querySelectorAll("div.elementor-widget-container")]
        .filter((el) => !!el.querySelector("h5 > strong"))

        .forEach((day) => {
          // Extract the date for use in `Date.parse`
          const date = `${day.querySelector("h5 > strong").innerHTML} 2021`;

          [...day.children].forEach((el) => {
            el.innerText = el.innerText.replace(
              /^1?[0-9]:[0-5][0-9] [AP]M/,
              (original_time) =>
                new Date(Date.parse(`${date} ${original_time} PDT`))
                  .toTimeString()
                  // Extract 'HH:MM'
                  .split(":", 2)
                  ?.join(":")
            );
          });
        });

    convertScheduleToLocalTime();

})();