Has the human 7-day week had any impact on the evolution of species?
I have no clear evidence of a specific species, but two pieces of the puzzle:


species can adapt to living in cities: birds living in cities are bolder (i.e. allow humans to come closer before flying away), and apparently even some genetic changes can be detected.
it may be possible for species to evolve a circaseptan rhythm: beach beetles may have a seven-day rhythm to accommodate for different heights of the tides (spring/neap tide). (PubMed / PDF)