Weird Coincidence?

Gregg and I like to watch mysteries. Cully is actually named after a character in one of our favorites (Midsomer Murders). So when our girl-hound started digging on the stair landing, my mind immediately assumed that there must be something sinister buried in that spot. Because, you see, that was Ray's favorite indoor place to dig. Outdoors he was not particular and neither is Cully. But indoors they both chose/choose the exact same location. As a matter of fact, Ray dug the stair landing so much that by the time he died there was very little rug remaining there. 

That is a coincidence. But not the weird one. The weird one is in the video. I took the video of Cully on  January 8, 2021 when I just happened to be sitting on the stairs with my laptop and she came up behind me and started digging. And when I found an old video of Ray that I had taken when he was still alive, it was from January 7, 2018. Almost exactly three years to the day from the other. So, do dogs need to go through some weird ritual digging in the early days of the new year to assure a good bone harvest? Or is there a body buried beneath our stairs (cue creepy music).