Package timestamps

I normally maintain a URL to return a sort of status and health check. Pre-lambda functions, I would normally return the newest (max) timestamp from a few key files.

I quickly noticed that the timestamps being returned were all January 1, 1980 and sort of figured this was an AWS thing. However, I recently noticed that this timestamp is in the actual compressed package file being created by the serverless package command.

Is it possible to override this behavior and either use the local timestamp or set a distinct timestamp?

Thanks, Richard