Second this for the US. Nothing major as a nation, but various small things in different areas or cities.
I know Hawaii does a Lei Day- “May day is Lei Day in Hawaii”. Not a full on holiday, but there’s usually festivities of various levels around the islands.
Off the main topic of the article here, but that was a roller coaster of thoughts for me with the Title and the link thumbnail-
Kinda looks like Drew Berrymore in the thumbnail, so “Bionic Girl Debuts…” oh cool, new movie—-wait, Drew lost her arms and now has prosthetics? Opened the article……Ohhh…