I have some difficulties logging the year when you select the year. I managed to hide the month and dates already though.
Simple datepicker
<ngb-datepicker
[(ngModel)]="model"
(dateSelect)="onDateChange($event)"
></ngb-datepicker>
I hope my answer will help you. Use (navigate)="navigateEvent($event)"
instead.
navigateEvent(event) {
console.log(event.next.year);
}