That's a pretty cool idea; now I'm thinking of other "logging" clocks, e.g. one that will plot the current temperature or other environmental factors on a strip of paper over the course of a year, producing an annual receipt like the github commit visualisation. It doesn't even need to be checked every year, it could have enough paper and storage in it to log decades, assuming an infinite pen or long-lasting thermal paper; perforations might also work, but in that case, having monthly or annual punch cards would be cool as well, like one of these player piano books.