[5.3] RTL Calendar Days (joomla#44900)

Author: brianteeman

build/media_source/system/js/fields/calendar.es5.js

@@ -653,6 +653,11 @@
 		}
 		this.firstdayname = (this.params.weekNumbers) ? row.firstChild.nextSibling : row.firstChild;
 
+    // Check if the direction is 'rtl' and reverse the shortDays array if true
+    if (this.params.direction === 'rtl') {
+      this.strings.shortDays.reverse();
+    }
+
 		var fdow = this.params.firstDayOfWeek,
 			cell = this.firstdayname,
 			weekend = this.params.weekend;