handle date in current conditions

frontend/src/views/CurrentView.js

@@ -10,10 +10,19 @@ var CurrentView = {
     return Weather.loadCurrent();
   },
   view: function() {
+
+    let timeHeading = null;
+    if (Weather.current !== null && Weather.current.time) {
+      const currentTime = new Date(Weather.current.time*1000);
+      timeHeading = m('h2.subtitle',
+        'as of ' + currentTime.toLocaleString()
+      );
+    }
+
     return m('div.section', [m('div.container',
       (Weather.current == null) ? [m('.notification', 'Loading current conditions...')] : [
       m('h1.title', 'Current Conditions'),
-      m('h2.subtitle', 'as of ' + Weather.current.time),
+      timeHeading,
       m('.level', [
         m('.level-item.has-text-centered', m("div",[
           m('p.heading"', 'Temperature'),