Add an explict configurable default timezone to prevent issues with moment

package.json

@@ -1,6 +1,6 @@
 {
   "name": "registration",
-  "version": "2.2.0",
+  "version": "2.2.1",
   "description": "Powerful and extensible registration system for hackathons and other large events",
   "main": "server/app.js",
   "scripts": {

server/common.ts

@@ -43,7 +43,8 @@ class Config implements IConfig.Main {
 		cookieMaxAge: 1000 * 60 * 60 * 24 * 30 * 6, // 6 months
 		cookieSecureOnly: false,
 		mongoURL: "mongodb://localhost/",
-		passwordResetExpiration: 1000 * 60 * 60 // 1 hour
+		passwordResetExpiration: 1000 * 60 * 60, // 1 hour
+		defaultTimezone: "America/New_York"
 	};
 	public admins: string[] = [];
 	public eventName: string = "Untitled Event";
@@ -200,6 +201,9 @@ class Config implements IConfig.Main {
 		if (process.env.MONGO_URL) {
 			this.server.mongoURL = process.env.MONGO_URL!;
 		}
+		if (process.env.DEFAULT_TIMEZONE) {
+			this.server.defaultTimezone = process.env.DEFAULT_TIMEZONE;
+		}
 		if (process.env.PASSWORD_RESET_EXPIRATION) {
 			let expirationTime = parseInt(process.env.PASSWORD_RESET_EXPIRATION!, 10);
 			if (!isNaN(expirationTime) && expirationTime > 0) {

server/routes/templates.ts

@@ -192,7 +192,7 @@ templateRoutes.route("/").get(authenticateWithRedirect, async (request, response
 	function formatMoment(date: moment.Moment | null): string {
 		const FORMAT = "dddd, MMMM Do YYYY [at] h:mm a z";
 		if (date) {
-			return date.tz(moment.tz.guess()).format(FORMAT);
+			return date.tz(config.server.defaultTimezone).format(FORMAT);
 		}
 		return "(No branches configured)";
 	}

server/schema.ts

@@ -33,6 +33,7 @@ export namespace IConfig {
 		cookieSecureOnly: boolean;
 		mongoURL: string;
 		passwordResetExpiration: number;
+		defaultTimezone: string;
 	}
 	export interface Style {
 		theme: string;