diff --git a/CHANGELOG.md b/CHANGELOG.md
index 000fb4c5..ff7c25d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,9 +26,14 @@ vendored versions of ExifTool match the version that they vendor.
 
 ## Version history
 
+### v23.3.0
+
+- 🐞 Restored datestamp parsing of `ResourceEvent.When`
+
 ### v23.2.0
 
 - ✨ Timezone parsing improvements:
+
   - Added [`ExifToolOptions.inferTimezoneFromDatestampTags`](https://photostructure.github.io/exiftool-vendored.js/interfaces/ExifToolOptions.html#inferTimezoneFromDatestampTags).
   - Timezone inference from datestamps now skips over UTC values, as Google
     Takeout (and several other applications) may spuriously set "+00:00" to
diff --git a/src/ReadTask.spec.ts b/src/ReadTask.spec.ts
index f3d16ba8..e012444a 100644
--- a/src/ReadTask.spec.ts
+++ b/src/ReadTask.spec.ts
@@ -1131,6 +1131,26 @@ describe("ReadTask", () => {
     })
   })
 
+  it("Resource.When is parsed by ExifDateTime", () => {
+    const t = parse({
+      tags: {
+        History: [
+          {
+            Action: "infer",
+            Changed: "Make",
+            Parameters: '"ppeggj"',
+            SoftwareAgent: "PhotoStructure",
+            When: "2023:10:01 17:13:07.141",
+          },
+        ],
+      },
+    })
+    expect(t.History).to.be.an("array")
+    const w = (t.History as any)[0].When
+    expect(w).to.be.instanceof(ExifDateTime)
+    expect(w.toString()).to.eql("2023-10-01T17:13:07.141")
+  })
+
   describe("SubSecDateTimeOriginal", () => {
     it("extracts datetimestamp with millis", () => {
       const t = parse({
diff --git a/src/ReadTask.ts b/src/ReadTask.ts
index e4ac0449..5e086789 100644
--- a/src/ReadTask.ts
+++ b/src/ReadTask.ts
@@ -285,7 +285,7 @@ export class ReadTask extends ExifToolTask<Tags> {
       if (typeof value === "object") {
         const result: any = {}
         for (const [k, v] of Object.entries(value)) {
-          result[k] = this.#parseTag(k, v)
+          result[k] = this.#parseTag(tagName + "." + k, v)
         }
         return result
       }
@@ -312,12 +312,17 @@ export class ReadTask extends ExifToolTask<Tags> {
           // Time-only tags have "time" but not "date" in their name:
           const keyIncludesTime = /time/i.test(tagName)
           const keyIncludesDate = /date/i.test(tagName)
+          const keyIncludesWhen = /when/i.test(tagName) // < ResourceEvent.When
           const result =
-            (keyIncludesTime || keyIncludesDate
+            (keyIncludesTime || keyIncludesDate || keyIncludesWhen
               ? ExifDateTime.from(value, tz)
               : undefined) ??
-            (keyIncludesTime ? ExifTime.fromEXIF(value) : undefined) ??
-            (keyIncludesDate ? ExifDate.from(value) : undefined) ??
+            (keyIncludesTime || keyIncludesWhen
+              ? ExifTime.fromEXIF(value)
+              : undefined) ??
+            (keyIncludesDate || keyIncludesWhen
+              ? ExifDate.from(value)
+              : undefined) ??
             value
           if (
             this.options.backfillTimezones &&