diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index c93daa37..3563f85e 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -4,13 +4,15 @@ Thanks for contributing to MagicMirror²!
 
 We hold our code to standard, and these standards are documented below.
 
+## Linters
+
 If you wish to run our linters, use `npm run lint` without any arguments.
 
 ### JavaScript: Run ESLint
 
 We use [ESLint](https://eslint.org) on our JavaScript files.
 
-Our ESLint configuration is in our .eslintrc.json and .eslintignore files.
+Our ESLint configuration is in our `.eslintrc.json` and `.eslintignore` files.
 
 To run ESLint, use `npm run lint:js`.
 
@@ -20,7 +22,15 @@ We use [StyleLint](https://stylelint.io) to lint our CSS. Our configuration is i
 
 To run StyleLint, use `npm run lint:css`.
 
-### Submitting Issues
+## Testing
+
+We use [Jest](https://jestjs.io) for JavaScript testing.
+
+To run all tests, use `npm run test`.
+
+The specific test commands are defined in `package.json`. So you can also run the specific tests with other commands, e.g. `npm run test:unit` or `npx jest tests/e2e/env_spec.js`.
+
+## Submitting Issues
 
 Please only submit reproducible issues.
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e3b09bbc..71a0edc4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -41,6 +41,7 @@ _This release is scheduled to be released on 2022-01-01._
 - Fixed electron tests with retry.
 - Fixed Calendar recurring cross timezone error (add/subtract a day, not just offset hours) (#2632)
 - Fixed Calendar showEnd and Full Date overlay (#2629)
+- Fixed regression on #2632, #2752
 - Broadcast custom symbols in CALENDAR_EVENTS
 
 ## [2.17.1] - 2021-10-01
diff --git a/js/electron.js b/js/electron.js
index 2c44ab02..509b5474 100644
--- a/js/electron.js
+++ b/js/electron.js
@@ -53,7 +53,7 @@ function createWindow() {
 	// If config.address is not defined or is an empty string (listening on all interfaces), connect to localhost
 
 	let prefix;
-	if (config["tls"] !== null && config["tls"]) {
+	if ((config["tls"] !== null && config["tls"]) || config.useHttps) {
 		prefix = "https://";
 	} else {
 		prefix = "http://";
@@ -140,6 +140,13 @@ app.on("before-quit", (event) => {
 	process.exit(0);
 });
 
+/* handle errors from self signed certificates */
+
+app.on("certificate-error", (event, webContents, url, error, certificate, callback) => {
+	event.preventDefault();
+	callback(true);
+});
+
 // Start the core application if server is run on localhost
 // This starts all node helpers and starts the webserver.
 if (["localhost", "127.0.0.1", "::1", "::ffff:127.0.0.1", undefined].includes(config.address)) {
diff --git a/modules/default/calendar/calendarutils.js b/modules/default/calendar/calendarutils.js
index 570a6e7e..a3bfaeab 100644
--- a/modules/default/calendar/calendarutils.js
+++ b/modules/default/calendar/calendarutils.js
@@ -332,15 +332,15 @@ const CalendarUtils = {
 							Log.debug("Fullday");
 							// If the offset is negative (east of GMT), where the problem is
 							if (dateoffset < 0) {
-								//if (dh <= Math.abs(dateoffset / 60)) {
-								// reduce the time by the offset
-								// Apply the correction to the date/time to get it UTC relative
-								date = new Date(date.getTime() - Math.abs(24 * 60) * 60000);
-								// the duration was calculated way back at the top before we could correct the start time..
-								// fix it for this event entry
-								//duration = 24 * 60 * 60 * 1000;
-								Log.debug("new recurring date1 is " + date);
-								//}
+								if (dh < Math.abs(dateoffset / 60)) {
+									// reduce the time by the offset
+									// Apply the correction to the date/time to get it UTC relative
+									date = new Date(date.getTime() - Math.abs(24 * 60) * 60000);
+									// the duration was calculated way back at the top before we could correct the start time..
+									// fix it for this event entry
+									//duration = 24 * 60 * 60 * 1000;
+									Log.debug("new recurring date1 fulldate is " + date);
+								}
 							} else {
 								// if the timezones are the same, correct date if needed
 								//if (event.start.tz === moment.tz.guess()) {
@@ -351,7 +351,7 @@ const CalendarUtils = {
 									// the duration was calculated way back at the top before we could correct the start time..
 									// fix it for this event entry
 									//duration = 24 * 60 * 60 * 1000;
-									Log.debug("new recurring date2 is " + date);
+									Log.debug("new recurring date2 fulldate is " + date);
 								}
 								//}
 							}