What to do with the "expired" poster?

Question

Search Engine Optimization

Hello!
Connoisseurs, I ask for your help. The site has a city poster, what about the pages of events that have already taken place?
For example, now the site of the past event simply removes and returns 404.
How do PS look at this? Often the page gets into the index and after a couple of days / weeks flies to 404.
Are there any recommendations about this?

Answer 1

It's better to make an archive.

Answer 2

Do not clean
Customize https://schema.org/Event