Why are the file dates Oct 26 1985 after npm install?

I publish a node node-red-contrib-.. on npm.
All file dates are actual.
When I install the node with npm install node-red-contrib-.. some files has file date
This is the date in film back to the future.

Is this a joke from npm :yum:?
Exist a workaround for this ?
My npm version is 6.14.10

I don't know why it happens but why does it matter? I don't think I have ever looked at the dates of installed nodes, why would one?