diff --git a/externs/shaka/offline.js b/externs/shaka/offline.js
index 01b3ec20aa..a50460bcd8 100644
--- a/externs/shaka/offline.js
+++ b/externs/shaka/offline.js
@@ -59,6 +59,7 @@ shaka.extern.StoredContent;
 
 /**
  * @typedef {{
+ *   creationTime: number,
  *   originalManifestUri: string,
  *   duration: number,
  *   size: number,
@@ -69,6 +70,8 @@ shaka.extern.StoredContent;
  *   appMetadata: Object
  * }}
  *
+ * @property {number} creationTime
+ *   The date time when the asset was created.
  * @property {string} originalManifestUri
  *   The URI that the manifest was originally loaded from.
  * @property {number} duration
diff --git a/lib/offline/indexeddb/v1_storage_cell.js b/lib/offline/indexeddb/v1_storage_cell.js
index 4ba4ccd5fb..a11e7db893 100644
--- a/lib/offline/indexeddb/v1_storage_cell.js
+++ b/lib/offline/indexeddb/v1_storage_cell.js
@@ -89,6 +89,7 @@ shaka.offline.indexeddb.V1StorageCell = class
         streamsPerPeriod);
 
     return {
+      creationTime: 0,
       originalManifestUri: old.originalManifestUri,
       duration: old.duration,
       size: old.size,
diff --git a/lib/offline/indexeddb/v2_storage_cell.js b/lib/offline/indexeddb/v2_storage_cell.js
index e96d1f5e51..8dcbd4dc20 100644
--- a/lib/offline/indexeddb/v2_storage_cell.js
+++ b/lib/offline/indexeddb/v2_storage_cell.js
@@ -50,6 +50,7 @@ shaka.offline.indexeddb.V2StorageCell = class
 
     return {
       appMetadata: old.appMetadata,
+      creationTime: 0,
       drmInfo: old.drmInfo,
       duration: old.duration,
       // JSON serialization turns Infinity into null, so turn it back now.
diff --git a/lib/offline/storage.js b/lib/offline/storage.js
index baa8405519..869139e432 100644
--- a/lib/offline/storage.js
+++ b/lib/offline/storage.js
@@ -962,6 +962,7 @@ shaka.offline.Storage = class {
     }
 
     return {
+      creationTime: Date.now(),
       originalManifestUri: originalManifestUri,
       duration: manifest.presentationTimeline.getDuration(),
       size: 0,
diff --git a/test/offline/manifest_convert_unit.js b/test/offline/manifest_convert_unit.js
index b77a8a3f77..79e4ee57b7 100644
--- a/test/offline/manifest_convert_unit.js
+++ b/test/offline/manifest_convert_unit.js
@@ -103,6 +103,7 @@ describe('ManifestConverter', () => {
           ]),
         },
         appMetadata: null,
+        creationTime: 0,
       };
 
       const manifest = createConverter().fromManifestDB(manifestDb);
@@ -134,6 +135,7 @@ describe('ManifestConverter', () => {
         sessionIds: [],
         drmInfo: null,
         appMetadata: null,
+        creationTime: 0,
         streams: [
           createVideoStreamDB(1, [0]),
           createVideoStreamDB(2, [1]),
@@ -160,6 +162,7 @@ describe('ManifestConverter', () => {
         sessionIds: [],
         drmInfo: null,
         appMetadata: null,
+        creationTime: 0,
         streams: [
           createAudioStreamDB(1, [0]),
           createAudioStreamDB(2, [1]),
@@ -186,6 +189,7 @@ describe('ManifestConverter', () => {
         sessionIds: [],
         drmInfo: null,
         appMetadata: null,
+        creationTime: 0,
         streams: [
           createVideoStreamDB(1, [0]),
           createTextStreamDB(2),
@@ -218,6 +222,7 @@ describe('ManifestConverter', () => {
         sessionIds: [],
         drmInfo: null,
         appMetadata: null,
+        creationTime: 0,
         streams: [
           // Audio
           createAudioStreamDB(audio1, [variant2]),
diff --git a/test/offline/offline_manifest_parser_unit.js b/test/offline/offline_manifest_parser_unit.js
index e7e4914de6..d8c9b6d4f5 100644
--- a/test/offline/offline_manifest_parser_unit.js
+++ b/test/offline/offline_manifest_parser_unit.js
@@ -198,6 +198,7 @@ filterDescribe('OfflineManifestParser', offlineManifestParserSupport, () => {
 
     /** @type {shaka.extern.ManifestDB} */
     const manifest = {
+      creationTime: Date.now(),
       originalManifestUri: '',
       duration: 600 * seconds,
       size: 100 * mb,
diff --git a/test/test/util/offline_utils.js b/test/test/util/offline_utils.js
index 2145b08e51..7ab5b91580 100644
--- a/test/test/util/offline_utils.js
+++ b/test/test/util/offline_utils.js
@@ -13,6 +13,7 @@ shaka.test.OfflineUtils = class {
    */
   static createManifest(originalUri) {
     return {
+      creationTime: Date.now(),
       appMetadata: null,
       drmInfo: null,
       duration: 90,