The concept of the leap second has been around for nearly my whole life. It’s like the leap day every 4 years, but it’s an extra second every 21 months to sync up tech and UTC time with the actual time around the sun. It’s created enough headaches with tech in the past decade or so, that starting in 2035, we’ll take a one century break from the practice. Our place around the sun will be off by nearly a minute at the end of that century, but by then, they’ll have to figure out the solution. Seems kind of strange to pass the buck, but this is a time feature that affects nearly nobody.

Member states of the International Bureau of Weights and Measures almost unanimously voted in support of scrapping leap seconds. The ad hoc time adjustments have caused headaches for numerous tech companies over the years.