That refutes the entire notion that the speed of light is slowing, a creationist argument that is "based on gross misinterpretations of inaccurate data" (from the article linked).
As an interesting aside... "Setterfield's hypothesis was so lacking in plausibility that even the Institute for Creation Research rejected it. (Acts and Facts, June 1988, G. Aardsma)" (also from the linked article).
Thanks for the querying attitude, but I find it disconcerting that you are actively seeking evidence to refute current dating methods, before even trying to learn about those dating methods and how they have come about. This demonstrates that you've already made up your mind, and wish now to cherry pick from the existing pool of knowledge anything that might support your world view.
I'd encourage you to read the MANY fact laden posts in the "Dates and Dating" Science forum, which is not to be confused with the "Seeking a Date" forum to be found on another website.