MensaplanPanel: Fixed API request

src/panels/Mensaplan/MensaplanPanel.tsx

@@ -193,7 +193,7 @@ const MensaplanPanel = (props: {definition: MensaPanelDefinition}) => {
 export default MensaplanPanel;
 
 function toYYYYMMDD(input: Date): string {
-  return `${input.getFullYear()}-${input.getMonth() + 1}-${input.getDate()}`
+  return `${input.getFullYear().toString().padStart(4, "20")}-${(input.getMonth() + 1).toString().padStart(2, "0")}-${input.getDate().toString().padStart(2, "0")}`
 }
 
 function typeToIcon(type: string): React.FC | null {