Comment by LeonM

11 hours ago

No, 27-7 for the rest of the world.

The separator is often the only way to distinguish American notation from ISO, so please use a dash for dd-mm-yy and a forward slash for mm/dd/yy

I've never seen dd-mm-yy. It's usually dd.mm.yy, dd.mm.yyyy, or yyyy-mm-dd, with some dd/mm/yy sprinkled in for general confusion.

Not really. Spain's traditional format is dd/mm/yyyy with slashes. This applies for a good chunk of Europe. Germany/Austria uses dot, I think nordic countries embraced the dash. While you might see more adoption in offical/digital contexts, I just double checked a few popular spanish websites, all slashes.