[SOLVED][V4]Calendar-Page - No new events possible

I am using F7 V4. Now I am playing around with the calendar-page element, like you can see in the Kitchensink. In the code of the calendar-events I can not see a setting to see a new event for a new date.

My code:

   <script>
  return {
    data: function () {
      var date = new Date();
      var year = date.getFullYear();
      var month = date.getMonth();
      var day = date.getDate();
      return {
        eventItems: [],
        events: [
          {
            date: new Date(2019, 2, 21),
            hours: 12,
            minutes: 30,
            title: 'Meeting with Vladimir',
            color: '#2196f3',
          },
          {
            date: new Date(year, month, day),
            hours: 12,
            minutes: 30,
            title: 'Meeting with Vladimir',
            color: '#ffd700',
          },
          {
            date: new Date(year, month, day),
            hours: 18,
            minutes: 0,
            title: 'Shopping',
            color: '#4caf50',
          },
          {
            date: new Date(year, month, day),
            hours: 21,
            minutes: 0,
            title: 'Gym',
            color: '#e91e63',
          },
          {
            date: new Date(year, month, day + 2),
            hours: 16,
            minutes: 0,
            title: 'Pay loan',
            color: '#2196f3',
          },
          {
            date: new Date(year, month, day + 2),
            hours: 21,
            minutes: 0,
            title: 'Gym',
            color: '#ff9800',
          },
        ],
      }
    },
    methods: {
      renderEvents: function (calendar) {
        var self = this;
        var currentDate = calendar.value[0];
        var currentEvents = self.events
          .filter(function (event) {
            return (
              event.date.getTime() >= currentDate.getTime() &&
              event.date.getTime() < currentDate.getTime() + 24 * 60 * 60 * 1000
            );
          });

        const eventItems = [];
        if (currentEvents.length) {
          currentEvents.forEach(function (event) {
            const hours = event.hours;
            let minutes = event.minutes;
            if (minutes < 10) minutes = `0${minutes}`;
            eventItems.push({
              title: event.title,
              time: `${hours}:${minutes}`,
              color: event.color,
            });
          });
        }
        self.$setState({
          eventItems: eventItems,
        });
      },
    },
    on: {
      pageInit: function (e, page) {
        var self = this;
        var app = self.$app;
        var $ = self.$;
        var monthNames = ['Januar', 'Februar', 'März', 'April', 'Mai', 'Juni', 'Juli', 'August' , 'September' , 'Oktober', 'November', 'Dezember'];
        self.calendar = app.calendar.create({
          containerEl: '#calendar',
          toolbar: false,
          value: [self.today],
          events: self.events,
          on: {
            init: function (calendar) {
              $('.navbar-calendar-title').text(monthNames[calendar.currentMonth] +', ' + calendar.currentYear);
              app.navbar.size(page.navbarEl);
              calendar.$el.addClass('no-safe-area-right');
              self.renderEvents(calendar);
            },
            monthYearChangeStart: function (calendar) {
              $('.navbar-calendar-title').text(monthNames[calendar.currentMonth] +', ' + calendar.currentYear);
              app.navbar.size(page.navbarEl);
            },
            change: function (calendar) {
              self.renderEvents(calendar);
            },
          }
        });
      },
      pageBeforeRemove() {
        var self = this;
        self.calendar.destroy();
      },
    },
  }
</script>

Above you can see that I am trying to have a new date on day 21st of FEB 2019. But there is no event for this day in the calendar. Please help!

Solution: The problem was the number that represent the month in Javascript. It was wrong in my code. Now it works!