Datetime cutting characters of year

I have a problem with display format in ion-datetime. I don’t know why ionic 2 cut last 2 characters of year. I know that is problem of min-width in column but I’m not sure how override this size.
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<ion-item>
    <ion-label floating color="light">Date of birth</ion-label>
    <ion-datetime displayFormat="DD/MM/YYYY" [(ngModel)]="form.dateOfBirth" name="dateOfBirth"></ion-datetime>
  </ion-item>
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