The problem with this approach is that it will filter out other legitimate children. You could filter out just the format with the following:

```js
var fieldLabel = $( "label" )
		.filter( "[for='" + fieldId + "']" )
		.clone()
		.find( ".datepicker-format" )
			.remove()
			.end()
		.text(),
		showFieldLabel = i18nText.show + fieldLabel,
```