Technically, We went from 11:59:59PM to 11:59:60PM. Yep. That’s right “60.” Did the ball drop in NY note that fact? Nooooo. Cowards. Would have messed up all the drunken revelers. Of course, this leap second did cause issues for various computer systems: “The root cause of the bug that affected our DNS service was the belief that time cannot go backwards.” https://blog.cloudflare.com/how-and-why-the-leap-second-affected-cloudflare-dns/

Programmers are the only people I know that feel silly for assuming “that time cannot go backwards.”