I am in one of the fields where author-date (Harvard) referencing is common, and I have not seen the style that you describe. Normally, it's either:
Author (2017) finds xyz.
Xyz (Author 2017).
Of course I do not know all the citation formats in all different fields, so it is possible that such style exists in some fields I don't know. However, based on some common style guides, I believe such style, if exists, is not common. For example, the Oxford Style Guide (New Hart's Rules), which covers a few different common reference styles, only gives author-date examples similar to what I've given here. The same is true for the APA Manual, which is a widely used style guide that prescribes the author-date system.
In some contexts (including some educational institutions), authors are expected to (at least roughly) follow a particular citation style. In such case, you can consult the reference guide.