Thank you.

I used the following in the Ext3 section and it seemed to work:

locale: “en-GB”,
eventTimeOptions: {timeStyle: ‘short’},

Thank you.

I used the following in the Ext3 section and it seemed to work:

locale: “en-GB”,
eventTimeOptions: {timeStyle: ‘short’},

I also have MMM-Config installed if that makes a difference.

/* Config Sample
 *
 * For more information on how you can configure this file
 * see https://docs.magicmirror.builders/configuration/introduction.html
 * and https://docs.magicmirror.builders/modules/configuration.html
 *
 * You can use environment variables using a `config.js.template` file instead of `config.js`
 * which will be converted to `config.js` while starting. For more information
 * see https://docs.magicmirror.builders/configuration/introduction.html#enviromnent-variables
 */
let config = {
	address: "localhost",	// Address to listen on, can be:
							// - "localhost", "127.0.0.1", "::1" to listen on loopback interface
							// - another specific IPv4/6 to listen on a specific interface
							// - "0.0.0.0", "::" to listen on any interface
							// Default, when address config is left out or empty, is "localhost"
	port: 8080,
	basePath: "/",	// The URL path where MagicMirror² is hosted. If you are using a Reverse proxy
									// you must set the sub path here. basePath must end with a /
	ipWhitelist: ["127.0.0.1", "::ffff:127.0.0.1", "::1"],	// Set [] to allow all IP addresses
									// or add a specific IPv4 of 192.168.1.5 :
									// ["127.0.0.1", "::ffff:127.0.0.1", "::1", "::ffff:192.168.1.5"],
									// or IPv4 range of 192.168.3.0 --> 192.168.3.15 use CIDR format :
									// ["127.0.0.1", "::ffff:127.0.0.1", "::1", "::ffff:192.168.3.0/28"],

	useHttps: false,			// Support HTTPS or not, default "false" will use HTTP
	httpsPrivateKey: "",	// HTTPS private key path, only require when useHttps is true
	httpsCertificate: "",	// HTTPS Certificate path, only require when useHttps is true

	language: "en",
	locale: "en-US",
	logLevel: ["INFO", "LOG", "WARN", "ERROR"], // Add "DEBUG" for even more logging
	timeFormat: 24,
	units: "metric",

	modules: [
		{
			module: "alert",
		},
		{
			module: "updatenotification",
			position: "top_bar"
		},
		{
			module: "clock",
			position: "top_left"
		},
		{
			module: 'MMM-2Day-NOAA-Forecast',
			position: 'top_right',
			config: {
			  lat: LAT,
			  lon: LONG,
			  units: 'imperial',
			  fontSize: '32px',
			  interval: 10 * 60 * 1000
			}
		},
		{
			module: "MMM-OnThisDayWikiApi",
			position: "top_center", // All available positions // <= this works in landscape
//			position: "middle_left",  // trying for vertical mode
			config: {  // See below for configurable options, this is optional
			  reloadInterval: 10000
			}
		},
		{
			module: "calendar", /* default/calendar module configuration */
//			position: "top_left",
  			config: {
    			  broadcastPastEvents: true, // <= IMPORTANT to see past events
    			  calendars: [
      			    {
        		      url: "webcal://www.calendarlabs.com/ical-calendar/ics/76/US_Holidays.ics",
        		      name: "us_holiday", // <= RECOMMENDED to assign name
        		      color: "orange" // <= RECOMMENDED to assign color
      			    },
                            {
			      url: "CALENDAR",
                              name: "NAME",
                              color: "purple"
			    },
			  ]
		  	}
		},
		{
			module: "MMM-CalendarExt3",
//			position: "bottom_bar",
			position: "lower_third",  // <= works in landscape mode
//			position: "upper_third",  // trying for vertical mode
			title: "",
			config: {
			  mode: "month",
			  instanceId: "basicCalendar",
			  locale: 'en-US',
			  maxEventLines: 5,
			  firstDayOfWeek: 0,
			  calendarSet: ['us_holiday', 'CALENDAR'],
			  eventTransformer: (event) => {
			    if (event.title.search("STB") > -1) event.color = "blue";
			    else if (event.title.search("St. B") > -1) event.color = "blue";
			    else if (event.title.search("FMCHS") > -1) event.color = "green";
			    else if (event.title.search("B-Day") > -1) event.color = "red";
//			    else if (event.description.search("Birthday") > -1) event.color = "red";
//			    else if (event.getDescription()?.toLowerCase().includes("birthday")) event.setColor(CalendarApp.EventColor.red);
			    return event;
			    }
			}
		},
		{
			module: "MMM-Dad-Jokes",
			position: "top_center",  // <= this works in landscape mode
//			position: "middle_right",  // <= trying for vertical mode
//			color: "red",
			config: {
			  updateInterval: 15000
			}
		},
		{
			module: 'MMM-Pir',
  			position: 'top_left',
  			config: {
    			  debug: false,
    			  Display: {
//     			    timeout: 2 * 60 * 1000,
			    timeout: 60 * 1000,
      			    animate: true,
//     			    style: 1,
			    stile: 2,
      			    colorFrom: "#FF0000",
      			    colorTo: "#00FF00",
//     			    mode: 1,
			    mode: 2,
      			    counter: true,
      			    lastPresence: true,
      			    lastPresenceTimeFormat: "LL H:mm",
			    availability: false,
//     			    availability: true,
      			    autoDimmer: false,
      		 	    xrandrForceRotation: "normal",
      			    wrandrForceRotation: "normal",
      			    wrandrForceMode: null,
      			    waylandDisplayName: "wayland-0",
      			    relayGPIOPin: 0
    			},
    			Pir: {
      			  mode: 0,
//     			  gpio: 21
			  gpio: 4
    			},
    			Motion: {
      			  deviceId: 0,
      			  captureIntervalTime: 1000,
      			  scoreThreshold: 100
    			},
    			Cron: {
      			  ON: [],
      			  OFF: []
    			},
    			Touch: {
      			mode: 3
    			},
    			Governor: {
      			  sleeping: 4,
      			  working: 2
    			},
    			Sounds: {
      			  on: "open.mp3",
      			  off: "close.mp3"
    			}
		}
  		},
	]
};

/*************** DO NOT EDIT THE LINE BELOW ***************/
if (typeof module !== "undefined") { module.exports = config; }