I have a tool where a user can generate a HTML link to my site for use on their site. The link is to a redirect page that redirects internally based on a calculation on the URL parameters. For example, link is example.com/2015-11-09
and the redirect calculates the difference between today's date and the URL parameter date. It then redirects to that URL, i.e. example.com/diff/1
, tomorrow it would be example.com/diff/2
.
Since the landing URL changes but original inbound link doesn't, would this type of link have a negative impact on overall site SEO?