TS：

import {Component} from '@angular/core';
import { NativeDateAdapter,DateAdapter,MD_DATE_FORMATS } from "@angular/material";

export class ItalianDateAdapter extends NativeDateAdapter {
  parse(value: any): Date | null {
    if ((typeof value === 'string') && (value.indexOf('/') > -1)) {
      const str = value.split('/');
      if (str.length < 2 || isNaN(+str[0]) || isNaN(+str[1]) || isNaN(+str[2])) {
        return null;
      }
      return new Date(Number(str[2]),Number(str[1]) - 1,Number(str[0]),12);
    }
    const timestamp = typeof value === 'number' ? value : Date.parse(value);
    return isNaN(timestamp) ? null : new Date(timestamp);
  }
}

@Component({
  selector: 'datepicker-overview-example',templateUrl: './datepicker-overview-example.html',styleUrls: ['./datepicker-overview-example.css'],providers: [{provide: DateAdapter,useClass: ItalianDateAdapter}],})
export class DatepickerOverviewExample {

  locale: string;

  constructor(private dateAdapter: DateAdapter<Date>) {
    this.locale = 'it';
    this.dateAdapter.setLocale('it');   
  }

}

Plunker demo

此错误已报告给材料团队,并由以下issue跟踪.