Fix timezone conversion.

src/App.jsx

@@ -20,15 +20,19 @@ WebFont.load({
 class App extends React.Component {
   static propTypes = {
     getNow: PropTypes.func,
-    weekdays: PropTypes.arrayOf(PropTypes.string),
+    weekdays: PropTypes.arrayOf(
+      PropTypes.oneOfType([
+        PropTypes.string,
+        PropTypes.number,
+      ])),
   }
 
   static defaultProps = {
     getNow: () => moment(),
     weekdays: [
-      'tuesday',
-      'thursday',
-      'saturday',
+      2,
+      4,
+      6,
     ],
   }
 

src/getUpcomingDate.js

@@ -1,12 +1,15 @@
 import moment from 'moment-timezone';
 
-export default function getUpcomingDate(now, weekday: String) {
+const localTimeZone = moment.tz.guess();
+
+export default function getUpcomingDate(now, weekday: String|Number) {
   let wanted = moment()
     .tz('CET')
     .isoWeekday(weekday)
     .second(0)
     .minute(0)
-    .hour(0);
+    .hour(0)
+    .tz(localTimeZone);
 
   if (wanted.isBefore(now)) {
     // we want the date from the upcoming week