fix MagicMirrorOrg#3267 again this time, dropped from big cal update

Author: sdetweil

CHANGELOG.md

@@ -56,6 +56,7 @@ _This release is scheduled to be released on 2025-01-01._
 - [calendar] - fix showEndsOnlyWithDuration not working, #3598, applies ONLY to full day events
 - [calendar] - fix showEnd for Full Day events #3602
 - [tests] Suppress "module is not defined" in e2e tests
+- [calendar] - fixes #3267 (styles array, really this time!)
 
 ## [2.29.0] - 2024-10-01
 

modules/default/calendar/calendar.js

@@ -907,9 +907,9 @@ Module.register("calendar", {
 		let p = this.getCalendarProperty(url, property, defaultValue);
 		if (property === "symbol" || property === "recurringSymbol" || property === "fullDaySymbol") {
 			const className = this.getCalendarProperty(url, "symbolClassName", this.config.defaultSymbolClassName);
-			p = className + p;
+			if (p instanceof Array) p.push(className);
+			else p = className + p;
 		}
-
 		if (!(p instanceof Array)) p = [p];
 		return p;
 	},