diff --git a/src/core/annotation.js b/src/core/annotation.js
index 4962e791a652c..b1b922af65625 100644
--- a/src/core/annotation.js
+++ b/src/core/annotation.js
@@ -26,7 +26,6 @@ import {
   BBOX_INIT,
   F32_BBOX_INIT,
   FeatureTest,
-  getModificationDate,
   info,
   isArrayEqual,
   LINE_DESCENT_FACTOR,
@@ -43,6 +42,7 @@ import {
   collectActions,
   escapeString,
   getInheritableProperty,
+  getModificationDate,
   getParentToUpdate,
   getRotationMatrix,
   IDENTITY_MATRIX,
diff --git a/src/core/core_utils.js b/src/core/core_utils.js
index 56fa0236f7a39..124dd625cd876 100644
--- a/src/core/core_utils.js
+++ b/src/core/core_utils.js
@@ -716,6 +716,22 @@ function stringToUTF16String(str, bigEndian = false) {
   return buf.join("");
 }
 
+function getModificationDate(date = new Date()) {
+  if (!(date instanceof Date)) {
+    date = new Date(date);
+  }
+  const buffer = [
+    date.getUTCFullYear().toString(),
+    (date.getUTCMonth() + 1).toString().padStart(2, "0"),
+    date.getUTCDate().toString().padStart(2, "0"),
+    date.getUTCHours().toString().padStart(2, "0"),
+    date.getUTCMinutes().toString().padStart(2, "0"),
+    date.getUTCSeconds().toString().padStart(2, "0"),
+  ];
+
+  return buffer.join("");
+}
+
 function getRotationMatrix(rotation, width, height) {
   switch (rotation) {
     case 90:
@@ -753,6 +769,7 @@ export {
   fetchBinaryData,
   getInheritableProperty,
   getLookupTableFactory,
+  getModificationDate,
   getNewAnnotationsMap,
   getParentToUpdate,
   getRotationMatrix,
diff --git a/src/core/editor/pdf_editor.js b/src/core/editor/pdf_editor.js
index d839f3cc64986..4e3b3b0349a8b 100644
--- a/src/core/editor/pdf_editor.js
+++ b/src/core/editor/pdf_editor.js
@@ -23,17 +23,14 @@
 import {
   deepCompare,
   getInheritableProperty,
+  getModificationDate,
   getNewAnnotationsMap,
   stringToAsciiOrUTF16BE,
 } from "../core_utils.js";
 import { Dict, isName, Name, Ref, RefSet, RefSetCache } from "../primitives.js";
-import {
-  getModificationDate,
-  stringToBytes,
-  stringToPDFString,
-} from "../../shared/util.js";
 import { incrementalUpdate, writeValue } from "../writer.js";
 import { NameTree, NumberTree } from "../name_number_tree.js";
+import { stringToBytes, stringToPDFString } from "../../shared/util.js";
 import { AnnotationFactory } from "../annotation.js";
 import { BaseStream } from "../base_stream.js";
 import { StringStream } from "../stream.js";
diff --git a/src/shared/util.js b/src/shared/util.js
index 089a74349fd37..c42103db197cd 100644
--- a/src/shared/util.js
+++ b/src/shared/util.js
@@ -69,6 +69,7 @@ const AnnotationMode = {
   ENABLE_STORAGE: 3,
 };
 
+const AnnotationPrefix = "pdfjs_internal_id_";
 const AnnotationEditorPrefix = "pdfjs_internal_editor_";
 
 const AnnotationEditorType = {
@@ -1122,22 +1123,6 @@ function isArrayEqual(arr1, arr2) {
   return true;
 }
 
-function getModificationDate(date = new Date()) {
-  if (!(date instanceof Date)) {
-    date = new Date(date);
-  }
-  const buffer = [
-    date.getUTCFullYear().toString(),
-    (date.getUTCMonth() + 1).toString().padStart(2, "0"),
-    date.getUTCDate().toString().padStart(2, "0"),
-    date.getUTCHours().toString().padStart(2, "0"),
-    date.getUTCMinutes().toString().padStart(2, "0"),
-    date.getUTCSeconds().toString().padStart(2, "0"),
-  ];
-
-  return buffer.join("");
-}
-
 let NormalizeRegex = null;
 let NormalizationMap = null;
 function normalizeUnicode(str) {
@@ -1169,8 +1154,6 @@ function getUuid() {
   return bytesToString(buf);
 }
 
-const AnnotationPrefix = "pdfjs_internal_id_";
-
 function _isValidExplicitDest(validRef, validName, dest) {
   if (!Array.isArray(dest) || dest.length < 2) {
     return false;
@@ -1273,7 +1256,6 @@ export {
   FeatureTest,
   FONT_IDENTITY_MATRIX,
   FormatError,
-  getModificationDate,
   getUuid,
   getVerbosityLevel,
   ImageKind,
diff --git a/test/unit/core_utils_spec.js b/test/unit/core_utils_spec.js
index 788e70eab5eda..54f5c5e17be50 100644
--- a/test/unit/core_utils_spec.js
+++ b/test/unit/core_utils_spec.js
@@ -20,6 +20,7 @@ import {
   escapePDFName,
   escapeString,
   getInheritableProperty,
+  getModificationDate,
   getSizeInBytes,
   isAscii,
   isWhiteSpace,
@@ -557,6 +558,14 @@ describe("core_utils", function () {
     });
   });
 
+  describe("getModificationDate", function () {
+    it("should get a correctly formatted date", function () {
+      const date = new Date(Date.UTC(3141, 5, 9, 2, 6, 53));
+      expect(getModificationDate(date)).toEqual("31410609020653");
+      expect(getModificationDate(date.toString())).toEqual("31410609020653");
+    });
+  });
+
   describe("getSizeInBytes", function () {
     it("should get the size in bytes to use to represent a positive integer", function () {
       expect(getSizeInBytes(0)).toEqual(0);
diff --git a/test/unit/util_spec.js b/test/unit/util_spec.js
index 447687a3ff28b..a06ffb5c68797 100644
--- a/test/unit/util_spec.js
+++ b/test/unit/util_spec.js
@@ -17,7 +17,6 @@ import {
   BaseException,
   bytesToString,
   createValidAbsoluteUrl,
-  getModificationDate,
   getUuid,
   stringToBytes,
   stringToPDFString,
@@ -210,14 +209,6 @@ describe("util", function () {
     });
   });
 
-  describe("getModificationDate", function () {
-    it("should get a correctly formatted date", function () {
-      const date = new Date(Date.UTC(3141, 5, 9, 2, 6, 53));
-      expect(getModificationDate(date)).toEqual("31410609020653");
-      expect(getModificationDate(date.toString())).toEqual("31410609020653");
-    });
-  });
-
   describe("getUuid", function () {
     it("should get uuid string", function () {
       const uuid = getUuid();