diff --git a/packages/js/src/lib/sync.ts b/packages/js/src/lib/sync.ts
index d56fe8305a..f14da471db 100644
--- a/packages/js/src/lib/sync.ts
+++ b/packages/js/src/lib/sync.ts
@@ -1,3 +1,4 @@
+import { diffInDays } from "@formbricks/lib/utils/datetime";
 import { TJsState, TJsStateSync, TJsSyncParams } from "@formbricks/types/js";
 
 import { Config } from "./config";
@@ -9,11 +10,6 @@ const logger = Logger.getInstance();
 
 let syncIntervalId: number | null = null;
 
-const diffInDays = (date1: Date, date2: Date) => {
-  const diffTime = Math.abs(date2.getTime() - date1.getTime());
-  return Math.floor(diffTime / (1000 * 60 * 60 * 24));
-};
-
 const syncWithBackend = async ({
   apiHost,
   environmentId,
diff --git a/packages/lib/invite/util.ts b/packages/lib/invite/util.ts
deleted file mode 100644
index f065c0cb22..0000000000
--- a/packages/lib/invite/util.ts
+++ /dev/null
@@ -1,14 +0,0 @@
-import "server-only";
-
-import { TInvite } from "@formbricks/types/invites";
-
-export const formatInviteDateFields = (invite: TInvite): TInvite => {
-  if (typeof invite.createdAt === "string") {
-    invite.createdAt = new Date(invite.createdAt);
-  }
-  if (typeof invite.expiresAt === "string") {
-    invite.expiresAt = new Date(invite.expiresAt);
-  }
-
-  return invite;
-};
diff --git a/packages/lib/response/tests/response.test.ts b/packages/lib/response/tests/response.test.ts
index 3faa369f92..e04fff9813 100644
--- a/packages/lib/response/tests/response.test.ts
+++ b/packages/lib/response/tests/response.test.ts
@@ -127,56 +127,3 @@ describe("Tests for Response Service", () => {
     });
   });
 });
-
-// describe("Response Service", () => {
-//   test("getResponsesByPersonId function", async () => {
-//     const responses = await getResponsesByPersonId(mockPersonId, 1);
-
-//     const expectedResponses = [expectedResponse];
-
-//     expect(responses).toHaveLength(1);
-//     expect(responses).toEqual(expectedResponses);
-//   });
-
-//   test("getResponseBySingleUseId function", async () => {
-//     const response = await getResponseBySingleUseId(mockSurveyId, mockSingleUseId);
-
-//     expect(response).toEqual(expectedResponse);
-//   });
-
-//   test("createResponse function", async () => {
-//     const response = await createResponse(mockResponseInput);
-//     expect(response).toEqual(expectedResponse);
-//   });
-
-//   test("getResponse function", async () => {
-//     const response = await getResponse(mockResponseId);
-//     expect(response).toEqual(expectedResponse);
-//   });
-
-//   test("getResponses function", async () => {
-//     const responses = await getResponses(mockSurveyId);
-//     expect(responses).toEqual([expectedResponse]);
-//   });
-
-//   test("getResponsesByEnvironmentId function", async () => {
-//     const responses = await getResponsesByEnvironmentId(mockEnvironmentId, 1);
-//     expect(responses).toHaveLength(1);
-//     expect(responses).toEqual([expectedResponse]);
-//   });
-
-//   test("updateResponse function", async () => {
-//     const response = await updateResponse(mockResponseId, mockResponseInput);
-//     expect(response).toEqual(expectedResponse);
-//   });
-
-//   test("deleteResponse function", async () => {
-//     const response = await deleteResponse(mockResponseId);
-//     expect(response).toEqual(expectedResponse);
-//   });
-
-//   test("getResponseCountBySurveyId function", async () => {
-//     const count = await getResponseCountBySurveyId(mockSurveyId);
-//     expect(count).toEqual(1);
-//   });
-// });
diff --git a/packages/lib/response/util.ts b/packages/lib/response/util.ts
index 7a73ba8cd9..54ef946d49 100644
--- a/packages/lib/response/util.ts
+++ b/packages/lib/response/util.ts
@@ -1,29 +1,6 @@
 import "server-only";
 
-import { TResponse, TResponseTtc } from "@formbricks/types/responses";
-
-export const formatResponseDateFields = (response: TResponse): TResponse => {
-  if (typeof response.createdAt === "string") {
-    response.createdAt = new Date(response.createdAt);
-  }
-  if (typeof response.updatedAt === "string") {
-    response.updatedAt = new Date(response.updatedAt);
-  }
-
-  response.notes = response.notes.map((note) => {
-    if (typeof note.createdAt === "string") {
-      note.createdAt = new Date(note.createdAt);
-    }
-
-    if (typeof note.updatedAt === "string") {
-      note.updatedAt = new Date(note.updatedAt);
-    }
-
-    return note;
-  });
-
-  return response;
-};
+import { TResponseTtc } from "@formbricks/types/responses";
 
 export function calculateTtcTotal(ttc: TResponseTtc) {
   const result = { ...ttc };
diff --git a/packages/lib/utils/array.ts b/packages/lib/utils/array.ts
deleted file mode 100644
index 243a5bd991..0000000000
--- a/packages/lib/utils/array.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-export function symmetricDifference<T>(arr1: T[], arr2: T[]): T[] {
-  return (arr1 || [])
-    .filter((x) => !(arr2 || []).includes(x))
-    .concat((arr2 || []).filter((x) => !(arr1 || []).includes(x)));
-}
diff --git a/packages/lib/utils/common.ts b/packages/lib/utils/common.ts
deleted file mode 100644
index 5d0b80631a..0000000000
--- a/packages/lib/utils/common.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-import { createId } from "@paralleldrive/cuid2";
-
-export function randomCuid2() {
-  return createId();
-}