diff --git a/src/material/datepicker/BUILD.bazel b/src/material/datepicker/BUILD.bazel
index ec13f563dd6f..bd34a54b90fd 100644
--- a/src/material/datepicker/BUILD.bazel
+++ b/src/material/datepicker/BUILD.bazel
@@ -85,6 +85,7 @@ ng_test_library(
         "//src/cdk/scrolling",
         "//src/cdk/testing/private",
         "//src/material/core",
+        "//src/material/dialog",
         "//src/material/form-field",
         "//src/material/input",
         "//src/material/testing",
diff --git a/src/material/datepicker/datepicker.spec.ts b/src/material/datepicker/datepicker.spec.ts
index 3f104a5c4253..f97e8e5dd5bd 100644
--- a/src/material/datepicker/datepicker.spec.ts
+++ b/src/material/datepicker/datepicker.spec.ts
@@ -9,7 +9,7 @@ import {
   dispatchKeyboardEvent,
   dispatchMouseEvent,
 } from '@angular/cdk/testing/private';
-import {Component, FactoryProvider, Type, ValueProvider, ViewChild} from '@angular/core';
+import {Component, Type, ViewChild, Provider} from '@angular/core';
 import {ComponentFixture, fakeAsync, flush, inject, TestBed, tick} from '@angular/core/testing';
 import {FormControl, FormsModule, NgModel, ReactiveFormsModule} from '@angular/forms';
 import {MAT_DATE_LOCALE, MatNativeDateModule, NativeDateModule} from '@angular/material/core';
@@ -18,6 +18,7 @@ import {DEC, JAN, JUL, JUN, SEP} from '@angular/material/testing';
 import {By} from '@angular/platform-browser';
 import {BrowserDynamicTestingModule} from '@angular/platform-browser-dynamic/testing';
 import {NoopAnimationsModule} from '@angular/platform-browser/animations';
+import {MAT_DIALOG_DEFAULT_OPTIONS, MatDialogConfig} from '@angular/material/dialog';
 import {Subject} from 'rxjs';
 import {MatInputModule} from '../input/index';
 import {MatDatepicker} from './datepicker';
@@ -32,7 +33,7 @@ describe('MatDatepicker', () => {
   function createComponent(
     component: Type<any>,
     imports: Type<any>[] = [],
-    providers: (FactoryProvider | ValueProvider)[] = [],
+    providers: Provider[] = [],
     entryComponents: Type<any>[] = []): ComponentFixture<any> {
 
     TestBed.configureTestingModule({
@@ -1761,6 +1762,24 @@ describe('MatDatepicker', () => {
     }));
   });
 
+  it('should not pick up values from the global dialog config', () => {
+    const fixture = createComponent(StandardDatepicker, [MatNativeDateModule], [{
+      provide: MAT_DIALOG_DEFAULT_OPTIONS,
+      useValue: {
+        minWidth: '1337px',
+        hasBackdrop: false
+      } as MatDialogConfig
+    }]);
+    fixture.componentInstance.touch = true;
+    fixture.detectChanges();
+    fixture.componentInstance.datepicker.open();
+    fixture.detectChanges();
+
+    const overlay = document.querySelector('.cdk-overlay-pane') as HTMLElement;
+    expect(document.querySelector('.cdk-overlay-backdrop')).toBeTruthy();
+    expect(overlay.style.minWidth).toBeFalsy();
+  });
+
 });
 
 
diff --git a/src/material/datepicker/datepicker.ts b/src/material/datepicker/datepicker.ts
index e395e4cf9e3e..54204b0cbd95 100644
--- a/src/material/datepicker/datepicker.ts
+++ b/src/material/datepicker/datepicker.ts
@@ -424,6 +424,20 @@ export class MatDatepicker<D> implements OnDestroy, CanColor {
       direction: this._dir ? this._dir.value : 'ltr',
       viewContainerRef: this._viewContainerRef,
       panelClass: 'mat-datepicker-dialog',
+
+      // These values are all the same as the defaults, but we set them explicitly so that the
+      // datepicker dialog behaves consistently even if the user changed the defaults.
+      hasBackdrop: true,
+      disableClose: false,
+      width: '',
+      height: '',
+      minWidth: '',
+      minHeight: '',
+      maxWidth: '80vw',
+      maxHeight: '',
+      position: {},
+      autoFocus: true,
+      restoreFocus: true
     });
 
     this._dialogRef.afterClosed().subscribe(() => this.close());