I've long had a list of "magic numbers" which show up in a bunch of places, and even made a post about it back in November of 2020. You ever wonder about certain permutations, like 497 days, or 19.6 years, or 5184 hours, and what they actually mean?

I've been doing that stuff by hand in a calculator and finally decided to just do it in Javascript and put it online for anyone to try.

So, here's my latest waste of CPU cycles:

My rollover calculator.

(via)