For DoB and DoD, wikipedia use a non standard ISO format, not easily readable.
Now the date is displayed in an human readable form, using the language setting as locale if available. If not, it uses the default locale.
It seems like Google image is doing a double urlencode on the url of the images. So we need to unquote once before sending to the browser the urls.
It solves the 404 we could see with some image with specials chars in url.
Exemple https://searx.laquadrature.net/?q=etes&pageno=1&category_images (there are two of those in the list)
Cqoicebordel