SE Chat - UTC Clock Userscript

SE-chat-UTC-clock.user.js

// ==UserScript==
// @name         Chat UTC Clock
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  UTC Clock for Stack Exchange Chat
// @author       hyper-neutrino
// @match        https://chat.stackexchange.com/rooms/*
// @match        https://chat.meta.stackexchange.com/rooms/*
// @match        https://chat.stackoverflow.com/rooms/*
// @match        https://chat.stackexchange.com/transcript/*
// @match        https://chat.meta.stackexchange.com/transcript/*
// @match        https://chat.stackoverflow.com/transcript/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    let clock = $("<span id='utcclock'>");
    let tritem = $("#info>.noprint>.msg-small");
    $("#chat-buttons").append(clock);

    clock.css("background-color", "#00000088");
    clock.css("color", "white");
    clock.css("padding", "4px 6px");
    clock.css("margin", "5px 0");
    clock.css("border-radius", "5px");

    setInterval(function() {
        clock.html(new Date().toUTCString());
        tritem.html("all times are UTC. It is currently " + new Date().toUTCString());
    }, 500);
})();