diff --git a/repository/TiddlyWiki/Tiddler.class.st b/repository/TiddlyWiki/Tiddler.class.st
index 5eec807..afdf1b7 100644
--- a/repository/TiddlyWiki/Tiddler.class.st
+++ b/repository/TiddlyWiki/Tiddler.class.st
@@ -155,7 +155,7 @@ Tiddler >> exportSTONFileInto: subfolder [
 	| stonFile output dashedTitle sanitized date |
 	dashedTitle := '-' join: (self title substrings collect: [ :each | each ]).
 	sanitized := dashedTitle copyWithoutAll: #($¿ $? $! $¡ $/).
-	date := self created hash hex copyFrom: 1 to: 5.
+	date := self uid.
 	stonFile := self wiki file parent / subfolder / (sanitized, '--', date, '.ston').
 	^ MarkupFile exportAsFileOn: stonFile containing: self asStonStringPretty
 ]
@@ -457,6 +457,17 @@ Tiddler >> type: anObject [
 	type := anObject
 ]
 
+{ #category : #accessing }
+Tiddler >> uid [
+	| tempId |
+	self created 
+		ifNotNil: [ tempId := self created  hash hex copyFrom: 1 to: 5. ]
+		ifNil: [ tempId :=  self class nowLocal hash hex copyFrom: 1 to: 5 ].
+	self customFields at: 'uid' put: tempId .
+	^  tempId 
+	
+]
+
 { #category : #accessing }
 Tiddler >> wiki [
 	^ wiki