diff --git a/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/fieldmanager.go b/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/fieldmanager.go
index f5b5cd6b69a..20e359d3f87 100644
--- a/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/fieldmanager.go
+++ b/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/fieldmanager.go
@@ -177,7 +177,7 @@ func (f *FieldManager) toUnversioned(obj runtime.Object) (runtime.Object, error)
 }
 
 func (f *FieldManager) buildManagerInfo(prefix string) string {
-	timestamp := time.Now().Format("20060102-150405MST")
+	timestamp := time.Now().UTC().Format(time.RFC3339)
 	if prefix == "" {
 		prefix = "unknown"
 	}