Calender NaN Problem ios device and safari

hey i need help when i run my code ios device gives me Nan pls what is my problem in my code?

html

  <ion-navbar>
    <button ion-button menuToggle *ngIf="!checkIfStaDetail">
      <ion-icon name="menu"></ion-icon>
    </button>
    <ion-title>İstatistik</ion-title>

    <ion-buttons end *ngIf="checkIfStaDetail">
      <button ion-button icon-only (click)="closeModal()">
        <ion-icon name="close"></ion-icon>
      </button>
    </ion-buttons>

  </ion-navbar>
</ion-header>

<ion-content overflow-scroll="true">

  <ion-list *ngFor="let item of t_list">
    <button ion-button full id="{{ item.id }}">
        {{ item.month_text }} {{ item.year }}
    </button>
    <mwl-calendar-month-view
      class="calendar-comp"
      [viewDate]="item.date"
      [events]="item.calEvents"
      [weekStartsOn]=1
      (dayClicked)="goToDetail($event.day.date)">
    </mwl-calendar-month-view>
  </ion-list>

</ion-content>
ts

import { Component } from ‘@angular/core’;
import { IonicPage, NavController, NavParams, LoadingController, ViewController } from ‘ionic-angular’;
import { Store } from ‘@ngrx/store’;
import { AppState } from ‘…/…/services/app-state’;

import { OnInit, TemplateRef, ViewChild } from ‘@angular/core’;
import { CalendarEvent } from ‘angular-calendar’;

import { Content } from ‘ionic-angular’;

import { StatisticsDetailPage } from ‘…/statistics-detail/statistics-detail’;

import { Http, Headers, RequestOptions } from ‘@angular/http’;

@IonicPage()
@Component({
selector: ‘page-statistics’,
templateUrl: ‘statistics.html’
})
export class StatisticsPage {

@ViewChild(Content) content: Content;

colors: any = {
red: {
primary: ‘#ff0000
},

green: {
  primary: '#00ff00'
},

black: {
  primary: '#000000'
}

}

months: Array = [
‘Ocak’, ‘Şubat’, ‘Mart’, ‘Nisan’, ‘Mayıs’, ‘Haziran’, ‘Temmuz’, ‘Ağustos’, ‘Eylül’, ‘Ekim’, ‘Kasım’, ‘Aralık’
];

t_list: any;

date: Date;
year: any;
month: any;
month_text: any;
daysOfMonth: any;
event: CalendarEvent;
calEvents: CalendarEvent;

fakeYear: number;

loading: any;

checkIfStaDetail: boolean = false;

constructor(
public navCtrl: NavController,
public navParams: NavParams,
public loadingCtrl: LoadingController,
public viewCtrl: ViewController,
public http: Http,
private store: Store) {

this.checkIfStaDetail = this.navParams.get('isStaDetail');
this.t_list = [];
this.fakeYear = new Date(Date.now()).getFullYear();

this.presentLoading();

let timerTotal = setInterval(() => {
  for(let i = 1; i <= 12; i++){
    this.init(new Date(this.fakeYear + "," + i.toString()));
    this.t_list.push({
      id: i,
      month_text: this.month_text,
      year: this.year,
      date: this.date,
      calEvents: this.calEvents
    });
  }

  this.dismissLoading();
  let tt = setInterval(() => {
    let element = document.getElementById((new Date(Date.now()).getMonth() + 1).toString());
    element.scrollIntoView();

    clearInterval(tt);
  }, 400);

  clearInterval(timerTotal);
}, 400);

}

paramDate: Date;
goToDetail(param){
if(this.checkIfStaDetail){
this.paramDate = param;
this.closeModal();
}
else{
this.navCtrl.push(StatisticsDetailPage, {
//dateStart: param.getDate() + “.” + param.getMonth() + “.” + param.getFullYear()
dateStart: param
});
}

}

ionViewDidLoad() {
}

init(date){
this.date = date;
this.year = this.date.getFullYear();
this.month = this.date.getMonth() + 1;
this.month_text = this.months[this.month - 1];
this.daysOfMonth = new Date(this.year, this.month, 0).getDate();

this.calEvents = [];

for(let i = 1; i <= this.daysOfMonth; i++){

  this.store.select(state => state.mistatistiks).forEach(sta => {
      for(let s of sta){
        if(new Date(s.date).getFullYear() == this.year && (new Date(s.date).getMonth() + 1) == this.month && new Date(s.date).getDate() == i){
          this.createEvent(new Date(this.year.toString() + "," +  this.month.toString() + "," + i.toString()), "Egzersiz", this.colors.green);
          break;
        }
      }

  });

}

}

createEvent(date, title, color){
this.event = {
start: date,
title: ‘’,
color: color
}

this.calEvents.push(this.event);

}

presentLoading(){
this.loading = this.loadingCtrl.create();
this.loading.present();
}

dismissLoading(){
this.loading.dismiss();
}

closeModal(){
this.viewCtrl.dismiss(this.paramDate);
}
}