Issue kewisch#515 for date-time values that fail to parse, fall back …

…to date only.

lib/ical/time.js

@@ -1150,11 +1150,24 @@
    * @return {ICAL.Time}            The date/time instance
    */
   ICAL.Time.fromString = function fromString(aValue, aProperty) {
-    if (aValue.length > 10) {
-      return ICAL.Time.fromDateTimeString(aValue, aProperty);
-    } else {
-      return ICAL.Time.fromDateString(aValue);
+    let useDateOnly = true;
+    let result;
+
+    try {
+      if (aValue.length > 10) {
+        result = ICAL.Time.fromDateTimeString(aValue, aProperty);
+        // If we arrive here, parsing worked, we can skip the fallback.
+        useDateOnly = false;
+      }
+    } catch (e) {}
+
+    if (useDateOnly) {
+      // Either the input is short, or parsing the long string failed,
+      // fall back to using the date, only.
+      result = ICAL.Time.fromDateString(aValue);
     }
+
+    return result;
   };
 
   /**