diff --git a/src/material-date-fns-adapter/adapter/date-fns-adapter.spec.ts b/src/material-date-fns-adapter/adapter/date-fns-adapter.spec.ts
index dcdc466b2bf2..f1f684f64b78 100644
--- a/src/material-date-fns-adapter/adapter/date-fns-adapter.spec.ts
+++ b/src/material-date-fns-adapter/adapter/date-fns-adapter.spec.ts
@@ -569,12 +569,12 @@ describe('DateFnsAdapter', () => {
     ).toBeGreaterThan(0);
   });
 
-  it('should add milliseconds to a date', () => {
-    const amount = 1234567;
+  it('should add seconds to a date', () => {
+    const amount = 20;
     const initial = new Date(2024, JAN, 1, 12, 34, 56);
-    const result = adapter.addMilliseconds(initial, amount);
+    const result = adapter.addSeconds(initial, amount);
     expect(result).not.toBe(initial);
-    expect(result.getTime() - initial.getTime()).toBe(amount);
+    expect(result.getTime() - initial.getTime()).toBe(amount * 1000);
   });
 });
 
diff --git a/src/material-date-fns-adapter/adapter/date-fns-adapter.ts b/src/material-date-fns-adapter/adapter/date-fns-adapter.ts
index 0cef3728d8fc..29e3b9927c83 100644
--- a/src/material-date-fns-adapter/adapter/date-fns-adapter.ts
+++ b/src/material-date-fns-adapter/adapter/date-fns-adapter.ts
@@ -23,7 +23,7 @@ import {
   addYears,
   addMonths,
   addDays,
-  addMilliseconds,
+  addSeconds,
   isValid,
   isDate,
   format,
@@ -262,7 +262,7 @@ export class DateFnsAdapter extends DateAdapter<Date, Locale> {
       }
     }
 
-    return set(this.clone(target), {hours, minutes, seconds});
+    return set(this.clone(target), {hours, minutes, seconds, milliseconds: 0});
   }
 
   override getHours(date: Date): number {
@@ -281,7 +281,7 @@ export class DateFnsAdapter extends DateAdapter<Date, Locale> {
     return this.parse(value, parseFormat);
   }
 
-  override addMilliseconds(date: Date, amount: number): Date {
-    return addMilliseconds(date, amount);
+  override addSeconds(date: Date, amount: number): Date {
+    return addSeconds(date, amount);
   }
 }
diff --git a/src/material-luxon-adapter/adapter/luxon-date-adapter.spec.ts b/src/material-luxon-adapter/adapter/luxon-date-adapter.spec.ts
index 1b6f90e1c5ac..8ee0701ece03 100644
--- a/src/material-luxon-adapter/adapter/luxon-date-adapter.spec.ts
+++ b/src/material-luxon-adapter/adapter/luxon-date-adapter.spec.ts
@@ -679,12 +679,12 @@ describe('LuxonDateAdapter', () => {
     ).toBeGreaterThan(0);
   });
 
-  it('should add milliseconds to a date', () => {
-    const amount = 1234567;
+  it('should add seconds to a date', () => {
+    const amount = 20;
     const initial = DateTime.local(2024, JAN, 1, 12, 34, 56);
-    const result = adapter.addMilliseconds(initial, amount);
+    const result = adapter.addSeconds(initial, amount);
     expect(result).not.toBe(initial);
-    expect(result.toMillis() - initial.toMillis()).toBe(amount);
+    expect(result.toMillis() - initial.toMillis()).toBe(amount * 1000);
   });
 });
 
diff --git a/src/material-luxon-adapter/adapter/luxon-date-adapter.ts b/src/material-luxon-adapter/adapter/luxon-date-adapter.ts
index c647a825d92b..5e7ade456685 100644
--- a/src/material-luxon-adapter/adapter/luxon-date-adapter.ts
+++ b/src/material-luxon-adapter/adapter/luxon-date-adapter.ts
@@ -296,6 +296,7 @@ export class LuxonDateAdapter extends DateAdapter<LuxonDateTime> {
       hour: hours,
       minute: minutes,
       second: seconds,
+      millisecond: 0,
     });
   }
 
@@ -323,8 +324,8 @@ export class LuxonDateAdapter extends DateAdapter<LuxonDateTime> {
     return result;
   }
 
-  override addMilliseconds(date: LuxonDateTime, amount: number): LuxonDateTime {
-    return date.reconfigure(this._getOptions()).plus({milliseconds: amount});
+  override addSeconds(date: LuxonDateTime, amount: number): LuxonDateTime {
+    return date.reconfigure(this._getOptions()).plus({seconds: amount});
   }
 
   /** Gets the options that should be used when constructing a new `DateTime` object. */
diff --git a/src/material-moment-adapter/adapter/moment-date-adapter.spec.ts b/src/material-moment-adapter/adapter/moment-date-adapter.spec.ts
index 2238723d8efc..86cb41c12f59 100644
--- a/src/material-moment-adapter/adapter/moment-date-adapter.spec.ts
+++ b/src/material-moment-adapter/adapter/moment-date-adapter.spec.ts
@@ -660,11 +660,11 @@ describe('MomentDateAdapter', () => {
   });
 
   it('should add milliseconds to a date', () => {
-    const amount = 1234567;
+    const amount = 20;
     const initial = moment([2024, JAN, 1, 12, 34, 56]);
-    const result = adapter.addMilliseconds(initial, amount);
+    const result = adapter.addSeconds(initial, amount);
     expect(result).not.toBe(initial);
-    expect(result.valueOf() - initial.valueOf()).toBe(amount);
+    expect(result.valueOf() - initial.valueOf()).toBe(amount * 1000);
   });
 });
 
diff --git a/src/material-moment-adapter/adapter/moment-date-adapter.ts b/src/material-moment-adapter/adapter/moment-date-adapter.ts
index c4fe1e6d72ae..81105fb70a0b 100644
--- a/src/material-moment-adapter/adapter/moment-date-adapter.ts
+++ b/src/material-moment-adapter/adapter/moment-date-adapter.ts
@@ -266,7 +266,7 @@ export class MomentDateAdapter extends DateAdapter<Moment> {
       }
     }
 
-    return this.clone(target).set({hours, minutes, seconds});
+    return this.clone(target).set({hours, minutes, seconds, milliseconds: 0});
   }
 
   override getHours(date: Moment): number {
@@ -285,8 +285,8 @@ export class MomentDateAdapter extends DateAdapter<Moment> {
     return this.parse(value, parseFormat);
   }
 
-  override addMilliseconds(date: Moment, amount: number): Moment {
-    return this.clone(date).add({milliseconds: amount});
+  override addSeconds(date: Moment, amount: number): Moment {
+    return this.clone(date).add({seconds: amount});
   }
 
   /** Creates a Moment instance while respecting the current UTC settings. */
diff --git a/src/material/core/datetime/date-adapter.ts b/src/material/core/datetime/date-adapter.ts
index e3ad332e1807..08bb8be38078 100644
--- a/src/material/core/datetime/date-adapter.ts
+++ b/src/material/core/datetime/date-adapter.ts
@@ -243,11 +243,11 @@ export abstract class DateAdapter<D, L = any> {
   }
 
   /**
-   * Adds an amount of milliseconds to the specified date.
-   * @param date Date to which to add the milliseconds.
-   * @param amount Amount of milliseconds to add to the date.
+   * Adds an amount of seconds to the specified date.
+   * @param date Date to which to add the seconds.
+   * @param amount Amount of seconds to add to the date.
    */
-  addMilliseconds(date: D, amount: number): D {
+  addSeconds(date: D, amount: number): D {
     throw new Error(NOT_IMPLEMENTED);
   }
 
diff --git a/src/material/core/datetime/native-date-adapter.spec.ts b/src/material/core/datetime/native-date-adapter.spec.ts
index a5112359b79f..cd1979274c2e 100644
--- a/src/material/core/datetime/native-date-adapter.spec.ts
+++ b/src/material/core/datetime/native-date-adapter.spec.ts
@@ -625,12 +625,12 @@ describe('NativeDateAdapter', () => {
     ).toBeGreaterThan(0);
   });
 
-  it('should add milliseconds to a date', () => {
-    const amount = 1234567;
+  it('should add seconds to a date', () => {
+    const amount = 20;
     const initial = new Date(2024, JAN, 1, 12, 34, 56);
-    const result = adapter.addMilliseconds(initial, amount);
+    const result = adapter.addSeconds(initial, amount);
     expect(result).not.toBe(initial);
-    expect(result.getTime() - initial.getTime()).toBe(amount);
+    expect(result.getTime() - initial.getTime()).toBe(amount * 1000);
   });
 });
 
diff --git a/src/material/core/datetime/native-date-adapter.ts b/src/material/core/datetime/native-date-adapter.ts
index 3b06966d817a..dff89e74e6de 100644
--- a/src/material/core/datetime/native-date-adapter.ts
+++ b/src/material/core/datetime/native-date-adapter.ts
@@ -355,8 +355,8 @@ export class NativeDateAdapter extends DateAdapter<Date> {
     return this.invalid();
   }
 
-  override addMilliseconds(date: Date, amount: number): Date {
-    return new Date(date.getTime() + amount);
+  override addSeconds(date: Date, amount: number): Date {
+    return new Date(date.getTime() + amount * 1000);
   }
 
   /** Creates a date but allows the month and date to overflow. */
diff --git a/tools/public_api_guard/material/core.md b/tools/public_api_guard/material/core.md
index abdc0028e14e..0314f9e075f4 100644
--- a/tools/public_api_guard/material/core.md
+++ b/tools/public_api_guard/material/core.md
@@ -59,7 +59,7 @@ export abstract class DateAdapter<D, L = any> {
     abstract addCalendarDays(date: D, days: number): D;
     abstract addCalendarMonths(date: D, months: number): D;
     abstract addCalendarYears(date: D, years: number): D;
-    addMilliseconds(date: D, amount: number): D;
+    addSeconds(date: D, amount: number): D;
     clampDate(date: D, min?: D | null, max?: D | null): D;
     abstract clone(date: D): D;
     compareDate(first: D, second: D): number;
@@ -409,7 +409,7 @@ export class NativeDateAdapter extends DateAdapter<Date> {
     // (undocumented)
     addCalendarYears(date: Date, years: number): Date;
     // (undocumented)
-    addMilliseconds(date: Date, amount: number): Date;
+    addSeconds(date: Date, amount: number): Date;
     // (undocumented)
     clone(date: Date): Date;
     // (undocumented)