How to tell when a package was last updated?

[Chris Green]

Is there any way to see when apt (or dpkg below it) last updated a
particular package?  

I am seeing some changes in how something works and I'm trying to find
out whether it's because I have changed something inadvertently (in
its configuration) or if a new version has been installed when I did
an 'apt update' which acts slightly differently from the previous
version.

-- 
Chris Green