Scammers are a real threat.

But i see (perhaps naively) that more awareness and education benefits everyone.

That is exactly what these international days do. They promote awareness. E.g. world backup day is March 31st.

I don't think it needs a test day, but how to recover  a wallet is something everyone should have practiced. Because when you need to use this skill, you may be tricked by scammers on the Internet.

Thinking we should invent an international 'test your recovery seed phrase' day.