diff --git a/packages/core/src/api.ts b/packages/core/src/api.ts
index 5198e887dc69..04e577b20be0 100644
--- a/packages/core/src/api.ts
+++ b/packages/core/src/api.ts
@@ -1,5 +1,5 @@
 import { DsnLike } from '@sentry/types';
-import { Dsn, timestampWithMs, urlEncode } from '@sentry/utils';
+import { Dsn, urlEncode } from '@sentry/utils';
 
 const SENTRY_API_VERSION = '7';
 
@@ -52,7 +52,6 @@ export class API {
   public getRequestHeaders(clientName: string, clientVersion: string): { [key: string]: string } {
     const dsn = this._dsnObject;
     const header = [`Sentry sentry_version=${SENTRY_API_VERSION}`];
-    header.push(`sentry_timestamp=${timestampWithMs()}`); // TODO: This can be removed
     header.push(`sentry_client=${clientName}/${clientVersion}`);
     header.push(`sentry_key=${dsn.user}`);
     if (dsn.pass) {
diff --git a/packages/core/test/lib/api.test.ts b/packages/core/test/lib/api.test.ts
index 99641c55b656..9aca55c1db1c 100644
--- a/packages/core/test/lib/api.test.ts
+++ b/packages/core/test/lib/api.test.ts
@@ -16,15 +16,13 @@ describe('API', () => {
   test('getRequestHeaders', () => {
     expect(new API(dsnPublic).getRequestHeaders('a', '1.0')).toMatchObject({
       'Content-Type': 'application/json',
-      'X-Sentry-Auth': expect.stringMatching(
-        /^Sentry sentry_version=\d, sentry_timestamp=\d+\.\d+, sentry_client=a\/1\.0, sentry_key=abc$/,
-      ),
+      'X-Sentry-Auth': expect.stringMatching(/^Sentry sentry_version=\d, sentry_client=a\/1\.0, sentry_key=abc$/),
     });
 
     expect(new API(legacyDsn).getRequestHeaders('a', '1.0')).toMatchObject({
       'Content-Type': 'application/json',
       'X-Sentry-Auth': expect.stringMatching(
-        /^Sentry sentry_version=\d, sentry_timestamp=\d+\.\d+, sentry_client=a\/1\.0, sentry_key=abc, sentry_secret=123$/,
+        /^Sentry sentry_version=\d, sentry_client=a\/1\.0, sentry_key=abc, sentry_secret=123$/,
       ),
     });
   });
diff --git a/packages/node/test/transports/http.test.ts b/packages/node/test/transports/http.test.ts
index 6e08f0a9f42c..31817cb4fcc3 100644
--- a/packages/node/test/transports/http.test.ts
+++ b/packages/node/test/transports/http.test.ts
@@ -28,7 +28,6 @@ function createTransport(options: TransportOptions): HTTPTransport {
 
 function assertBasicOptions(options: any): void {
   expect(options.headers['X-Sentry-Auth']).toContain('sentry_version');
-  expect(options.headers['X-Sentry-Auth']).toContain('sentry_timestamp');
   expect(options.headers['X-Sentry-Auth']).toContain('sentry_client');
   expect(options.headers['X-Sentry-Auth']).toContain('sentry_key');
   expect(options.port).toEqual('8989');
diff --git a/packages/node/test/transports/https.test.ts b/packages/node/test/transports/https.test.ts
index b31deb893776..d1de8cf2a0b4 100644
--- a/packages/node/test/transports/https.test.ts
+++ b/packages/node/test/transports/https.test.ts
@@ -34,7 +34,6 @@ function createTransport(options: TransportOptions): HTTPSTransport {
 
 function assertBasicOptions(options: any): void {
   expect(options.headers['X-Sentry-Auth']).toContain('sentry_version');
-  expect(options.headers['X-Sentry-Auth']).toContain('sentry_timestamp');
   expect(options.headers['X-Sentry-Auth']).toContain('sentry_client');
   expect(options.headers['X-Sentry-Auth']).toContain('sentry_key');
   expect(options.port).toEqual('8989');