Assign value to a date in angular 2 (binding)

Good evening.

I need to set / assign a value to a date of a specific component that is a date before loading my page. In this example I try to assign the first and last day of the month.

HTML:

<pf-input-date [(date)]="fechaHasta" mode="day" name="fechaHasta"></pf-input-date>

TypeScript:

export class LiquidoProductoComponent implements OnInit {
    fechaDesde: Date;
    fechaHasta: Date;
    date: Date;


    ngOnInit() {
        this.date = new Date();

        // Verificar
        let desde = new Date(this.date.getFullYear(), this.date.getMonth(), 1);
        var hasta = new Date(this.date.getFullYear(), this.date.getMonth() + 1, 0);

 // Esta asignacion la realiza pero no asi el binding

        this.fechaDesde = desde; 
        this.fechaHasta = hasta;

    };
}

Thank you very much already.