diff --git a/repository/ZTimestamp-GT/ZTimestampFormat.extension.st b/repository/ZTimestamp-GT/ZTimestampFormat.extension.st
new file mode 100644
index 0000000..a94a03e
--- /dev/null
+++ b/repository/ZTimestamp-GT/ZTimestampFormat.extension.st
@@ -0,0 +1,15 @@
+Extension { #name : #ZTimestampFormat }
+
+{ #category : #'*ZTimestamp-GT' }
+ZTimestampFormat >> gtViewDetailsIn: composite [
+	<gtView>
+	^ composite columnedList
+		title: 'Details';
+		items: [ {('specification by example' -> self specification).
+			('now' -> (self format: ZTimestamp now)).
+			('elements' -> (self specificationElements)).
+			('timezone' -> (self timezone ifNil: [ #UTC ])) } ];
+		column: 'Key' text: #key;
+		column: 'Value' text: #value;
+		send: #value
+]