diff --git a/ui/src/shared/components/object-parser.test.ts b/ui/src/shared/components/object-parser.test.ts
index f787f293d5ff..357f0e0caa41 100644
--- a/ui/src/shared/components/object-parser.test.ts
+++ b/ui/src/shared/components/object-parser.test.ts
@@ -1,6 +1,15 @@
 import {exampleWorkflowTemplate} from '../examples';
 import {parse, stringify} from './object-parser';
 
+describe('parse and stringify are inverses', () => {
+    it('handles creationTimestamp', () => {
+        const testWorkflowTemplate = exampleWorkflowTemplate('test');
+        testWorkflowTemplate.metadata.creationTimestamp = '2024-11-17T06:56:52Z';
+        expect(parse(stringify(testWorkflowTemplate, 'yaml'))).toEqual(testWorkflowTemplate);
+        expect(parse(stringify(testWorkflowTemplate, 'json'))).toEqual(testWorkflowTemplate);
+    });
+});
+
 describe('parse', () => {
     it('handles a valid JSON string', () => {
         expect(parse('{}')).toEqual({});
diff --git a/ui/src/shared/components/object-parser.ts b/ui/src/shared/components/object-parser.ts
index 7b4800abf660..b39e0dd7b919 100644
--- a/ui/src/shared/components/object-parser.ts
+++ b/ui/src/shared/components/object-parser.ts
@@ -1,17 +1,16 @@
 import YAML from 'yaml';
 
+// Default is YAML 1.2, but Kubernetes uses YAML 1.1, which leads to subtle bugs.
+// See https://github.com/argoproj/argo-workflows/issues/12205#issuecomment-2111572189
+const yamlVersion = '1.1';
+
 export function parse<T>(value: string): T {
     if (value.startsWith('{')) {
         return JSON.parse(value);
     }
-    return YAML.parse(value, {
-        // Default is YAML 1.2, but Kubernetes uses YAML 1.1, which leads to subtle bugs.
-        // See https://github.com/argoproj/argo-workflows/issues/12205#issuecomment-2111572189
-        version: '1.1',
-        strict: false
-    }) as T;
+    return YAML.parse(value, {version: yamlVersion, strict: false}) as T;
 }
 
 export function stringify<T>(value: T, type: string) {
-    return type === 'yaml' ? YAML.stringify(value, {aliasDuplicateObjects: false}) : JSON.stringify(value, null, '  ');
+    return type === 'yaml' ? YAML.stringify(value, {aliasDuplicateObjects: false, version: yamlVersion, strict: false}) : JSON.stringify(value, null, '  ');
 }