Merge pull request #1699 from Hg347/calendar-1696

fixed calendar, issue 1696, ics file start date is not date type

CHANGELOG.md

@@ -33,6 +33,7 @@ Added UK Met Office Datapoint feed as a provider in the default weather module.
 - Only update clock once per minute when seconds aren't shown
 
 ### Fixed
+- fixed issue [#1696](https://github.com/MichMich/MagicMirror/issues/1696), some ical files start date to not parse to date type 
 - Allowance HTML5 autoplay-policy (policy is changed from Chrome 66 updates)
 - Handle SIGTERM messages
 - Fixes sliceMultiDayEvents so it respects maximumNumberOfDays

modules/default/calendar/vendor/ical.js/node-ical.js

@@ -37,13 +37,17 @@ ical.objectHandlers['END'] = function(val, params, curr, stack){
         }
       }
 
+      if( typeof (curr.start) === "date") {
           rule += ' DTSTART:' + curr.start.toISOString().replace(/[-:]/g, '');
           rule = rule.replace(/\.[0-9]{3}/, '');
       }
+    }
     for (var i in curr.exdates) {
+        if( typeof (curr.exdates[i]) === "date") {
             rule += ' EXDATE:' + curr.exdates[i].toISOString().replace(/[-:]/g, '');
             rule = rule.replace(/\.[0-9]{3}/, '');
         }
+    }
     try {
       curr.rrule = rrulestr(rule);
     }