Ion-datetime issue with event

<ion-datetime (ionChange)=“changedate(details.date,$event)” type=“date” id=“datevalue” name=“date” min={{startDate}} max={{nextDate}} [(ngModel)]=“details.date” placeholder=“Pick Date”>

changedate(date, e) {
date = this.datepipe.transform(this.details.date, “dd-MM-yyyy”)
this.getnewdate = new Date(e.target.value).getUTCDay();
console.log();
}

ERROR TypeError: Cannot read property ‘value’ of undefined

thanks in advance