diff --git a/packages/browser/test/integration/polyfills/raf.js b/packages/browser/test/integration/polyfills/raf.js
index 1d6bc9935c65..2b84451134d2 100644
--- a/packages/browser/test/integration/polyfills/raf.js
+++ b/packages/browser/test/integration/polyfills/raf.js
@@ -17,7 +17,7 @@
 
   if (!window.requestAnimationFrame)
     window.requestAnimationFrame = function (callback, _element) {
-      var currTime = new Date().getTime();
+      var currTime = Date.now();
       var timeToCall = Math.max(0, 16 - (currTime - lastTime));
       var id = window.setTimeout(function () {
         callback(currTime + timeToCall);
diff --git a/packages/integrations/test/offline.test.ts b/packages/integrations/test/offline.test.ts
index 624c166763b8..1dac96bc1e53 100644
--- a/packages/integrations/test/offline.test.ts
+++ b/packages/integrations/test/offline.test.ts
@@ -194,7 +194,7 @@ function prepopulateEvents(count: number = 1): void {
   for (let i = 0; i < count; i++) {
     events.push({
       message: 'There was an error!',
-      timestamp: new Date().getTime(),
+      timestamp: Date.now(),
     });
   }
 }
diff --git a/packages/replay/src/coreHandlers/handleHistory.ts b/packages/replay/src/coreHandlers/handleHistory.ts
index 4732c0118831..f75998689c01 100644
--- a/packages/replay/src/coreHandlers/handleHistory.ts
+++ b/packages/replay/src/coreHandlers/handleHistory.ts
@@ -9,7 +9,7 @@ interface HistoryHandlerData {
 function handleHistory(handlerData: HistoryHandlerData): ReplayPerformanceEntry {
   const { from, to } = handlerData;
 
-  const now = new Date().getTime() / 1000;
+  const now = Date.now() / 1000;
 
   return {
     type: 'navigation.push',
diff --git a/packages/replay/src/replay.ts b/packages/replay/src/replay.ts
index c42a5cc5b9b6..df2f3e6c9774 100644
--- a/packages/replay/src/replay.ts
+++ b/packages/replay/src/replay.ts
@@ -78,7 +78,7 @@ export class ReplayContainer implements ReplayContainerInterface {
   /**
    * Timestamp of the last user activity. This lives across sessions.
    */
-  private _lastActivity: number = new Date().getTime();
+  private _lastActivity: number = Date.now();
 
   /**
    * Is the integration currently active?
@@ -108,7 +108,7 @@ export class ReplayContainer implements ReplayContainerInterface {
     traceIds: new Set(),
     urls: [],
     earliestEvent: null,
-    initialTimestamp: new Date().getTime(),
+    initialTimestamp: Date.now(),
     initialUrl: '',
   };
 
@@ -442,7 +442,7 @@ export class ReplayContainer implements ReplayContainerInterface {
     this._clearContext();
 
     this._context.initialUrl = url;
-    this._context.initialTimestamp = new Date().getTime();
+    this._context.initialTimestamp = Date.now();
     this._context.urls.push(url);
   }
 
@@ -634,14 +634,14 @@ export class ReplayContainer implements ReplayContainerInterface {
   /**
    * Update user activity (across session lifespans)
    */
-  private _updateUserActivity(_lastActivity: number = new Date().getTime()): void {
+  private _updateUserActivity(_lastActivity: number = Date.now()): void {
     this._lastActivity = _lastActivity;
   }
 
   /**
    * Updates the session's last activity timestamp
    */
-  private _updateSessionActivity(_lastActivity: number = new Date().getTime()): void {
+  private _updateSessionActivity(_lastActivity: number = Date.now()): void {
     if (this.session) {
       this.session.lastActivity = _lastActivity;
       this._maybeSaveSession();
@@ -768,7 +768,7 @@ export class ReplayContainer implements ReplayContainerInterface {
         eventContext,
         session: this.session,
         options: this.getOptions(),
-        timestamp: new Date().getTime(),
+        timestamp: Date.now(),
       });
     } catch (err) {
       this._handleException(err);
diff --git a/packages/replay/src/session/Session.ts b/packages/replay/src/session/Session.ts
index d20fa0daf33c..9089ea54c76c 100644
--- a/packages/replay/src/session/Session.ts
+++ b/packages/replay/src/session/Session.ts
@@ -7,7 +7,7 @@ import { isSampled } from '../util/isSampled';
  * Get a session with defaults & applied sampling.
  */
 export function makeSession(session: Partial<Session> & { sampled: Sampled }): Session {
-  const now = new Date().getTime();
+  const now = Date.now();
   const id = session.id || uuid4();
   // Note that this means we cannot set a started/lastActivity of `0`, but this should not be relevant outside of tests.
   const started = session.started || now;
diff --git a/packages/replay/src/util/addEvent.ts b/packages/replay/src/util/addEvent.ts
index 357ecaca0e61..b32050665519 100644
--- a/packages/replay/src/util/addEvent.ts
+++ b/packages/replay/src/util/addEvent.ts
@@ -31,7 +31,7 @@ export async function addEvent(
   // page has been left open and idle for a long period of time and user
   // comes back to trigger a new session. The performance entries rely on
   // `performance.timeOrigin`, which is when the page first opened.
-  if (timestampInMs + replay.timeouts.sessionIdle < new Date().getTime()) {
+  if (timestampInMs + replay.timeouts.sessionIdle < Date.now()) {
     return null;
   }
 
diff --git a/packages/replay/src/util/addMemoryEntry.ts b/packages/replay/src/util/addMemoryEntry.ts
index 8d31e06cd9d9..92431e45f2d4 100644
--- a/packages/replay/src/util/addMemoryEntry.ts
+++ b/packages/replay/src/util/addMemoryEntry.ts
@@ -33,7 +33,7 @@ function createMemoryEntry(memoryEntry: MemoryInfo): ReplayMemoryEntry {
   const { jsHeapSizeLimit, totalJSHeapSize, usedJSHeapSize } = memoryEntry;
   // we don't want to use `getAbsoluteTime` because it adds the event time to the
   // time origin, so we get the current timestamp instead
-  const time = new Date().getTime() / 1000;
+  const time = Date.now() / 1000;
   return {
     type: 'memory',
     name: 'memory',
diff --git a/packages/replay/src/util/createBreadcrumb.ts b/packages/replay/src/util/createBreadcrumb.ts
index b9f7527b0180..b8ff6097d571 100644
--- a/packages/replay/src/util/createBreadcrumb.ts
+++ b/packages/replay/src/util/createBreadcrumb.ts
@@ -9,7 +9,7 @@ export function createBreadcrumb(
   breadcrumb: Pick<Breadcrumb, RequiredProperties> & Partial<Omit<Breadcrumb, RequiredProperties>>,
 ): Breadcrumb {
   return {
-    timestamp: new Date().getTime() / 1000,
+    timestamp: Date.now() / 1000,
     type: 'default',
     ...breadcrumb,
   };
diff --git a/packages/replay/test/fixtures/error.ts b/packages/replay/test/fixtures/error.ts
index 6008f81209e1..046efa619539 100644
--- a/packages/replay/test/fixtures/error.ts
+++ b/packages/replay/test/fixtures/error.ts
@@ -1,7 +1,7 @@
 import type { Event } from '@sentry/types';
 
 export function Error(obj?: Event): any {
-  const timestamp = new Date().getTime() / 1000;
+  const timestamp = Date.now() / 1000;
 
   return {
     exception: {
diff --git a/packages/replay/test/fixtures/transaction.ts b/packages/replay/test/fixtures/transaction.ts
index 1e8ec7a3272a..9362749e7c3b 100644
--- a/packages/replay/test/fixtures/transaction.ts
+++ b/packages/replay/test/fixtures/transaction.ts
@@ -1,7 +1,7 @@
 import type { Event, SeverityLevel } from '@sentry/types';
 
 export function Transaction(traceId?: string, obj?: Partial<Event>): any {
-  const timestamp = new Date().getTime() / 1000;
+  const timestamp = Date.now() / 1000;
 
   return {
     contexts: {
diff --git a/packages/replay/test/mocks/mockRrweb.ts b/packages/replay/test/mocks/mockRrweb.ts
index cef95093d125..0c7ef971483d 100644
--- a/packages/replay/test/mocks/mockRrweb.ts
+++ b/packages/replay/test/mocks/mockRrweb.ts
@@ -19,7 +19,7 @@ export type RecordMock = jest.MockedFunction<typeof rrwebRecord> & RecordAdditio
 function createCheckoutPayload(isCheckout: boolean = true) {
   return {
     data: { isCheckout },
-    timestamp: new Date().getTime(),
+    timestamp: Date.now(),
     type: isCheckout ? 2 : 3,
   };
 }
diff --git a/packages/replay/test/unit/coreHandlers/handleScope.test.ts b/packages/replay/test/unit/coreHandlers/handleScope.test.ts
index c7ba7cdc75ce..2f46fafba635 100644
--- a/packages/replay/test/unit/coreHandlers/handleScope.test.ts
+++ b/packages/replay/test/unit/coreHandlers/handleScope.test.ts
@@ -24,7 +24,7 @@ describe('Unit | coreHandlers | handleScope', () => {
     }
 
     const testMsg = {
-      timestamp: new Date().getTime() / 1000,
+      timestamp: Date.now() / 1000,
       message: 'testing',
       category: 'console',
     };
diff --git a/packages/replay/test/unit/session/getSession.test.ts b/packages/replay/test/unit/session/getSession.test.ts
index 4ac92b148e75..2e7d3ec969b7 100644
--- a/packages/replay/test/unit/session/getSession.test.ts
+++ b/packages/replay/test/unit/session/getSession.test.ts
@@ -17,7 +17,7 @@ const SAMPLE_RATES = {
   errorSampleRate: 0,
 };
 
-function createMockSession(when: number = new Date().getTime()) {
+function createMockSession(when: number = Date.now()) {
   return makeSession({
     id: 'test_session_id',
     segmentId: 0,
@@ -66,7 +66,7 @@ describe('Unit | session | getSession', () => {
   });
 
   it('creates a non-sticky session, regardless of session existing in sessionStorage', function () {
-    saveSession(createMockSession(new Date().getTime() - 10000));
+    saveSession(createMockSession(Date.now() - 10000));
 
     const { session } = getSession({
       timeouts: {
@@ -93,8 +93,8 @@ describe('Unit | session | getSession', () => {
       ...SAMPLE_RATES,
       currentSession: makeSession({
         id: 'old_session_id',
-        lastActivity: new Date().getTime() - 1001,
-        started: new Date().getTime() - 1001,
+        lastActivity: Date.now() - 1001,
+        started: Date.now() - 1001,
         segmentId: 0,
         sampled: 'session',
       }),
@@ -142,7 +142,7 @@ describe('Unit | session | getSession', () => {
   });
 
   it('fetches an existing sticky session', function () {
-    const now = new Date().getTime();
+    const now = Date.now();
     saveSession(createMockSession(now));
 
     const { session } = getSession({
@@ -168,8 +168,8 @@ describe('Unit | session | getSession', () => {
   });
 
   it('fetches an expired sticky session', function () {
-    const now = new Date().getTime();
-    saveSession(createMockSession(new Date().getTime() - 2000));
+    const now = Date.now();
+    saveSession(createMockSession(Date.now() - 2000));
 
     const { session } = getSession({
       timeouts: {
diff --git a/packages/svelte/test/performance.test.ts b/packages/svelte/test/performance.test.ts
index cbfd320f35bd..1e02eb549d5f 100644
--- a/packages/svelte/test/performance.test.ts
+++ b/packages/svelte/test/performance.test.ts
@@ -80,7 +80,7 @@ describe('Sentry.trackComponent()', () => {
   it('creates an update span, when the component is updated', async () => {
     // Make the finish() function actually end the initSpan
     testInitSpan.finish.mockImplementation(() => {
-      testInitSpan.endTimestamp = new Date().getTime();
+      testInitSpan.endTimestamp = Date.now();
     });
 
     // first we create the component
@@ -171,7 +171,7 @@ describe('Sentry.trackComponent()', () => {
   it("doesn't record update spans, if there's no ongoing transaction at that time", async () => {
     // Make the finish() function actually end the initSpan
     testInitSpan.finish.mockImplementation(() => {
-      testInitSpan.endTimestamp = new Date().getTime();
+      testInitSpan.endTimestamp = Date.now();
     });
 
     // first we create the component