The leap second is the rare and obscure practice of occasionally adding a second to the Coordinated Universal Time (UTC) system that most of us use to set our watches. It’s necessary, but not exactly computer friendly. In 2012 it crashed websites such as Reddit and Yelp and snarled up airline departures in Australia, so you’d think most computer experts would really hate them. After all, we have perfectly accurate timekeeping systems, such as the one used by GPS, that don’t futz with leap seconds.
But it turns out many computer folks are OK with the leap second, including Linux’s creator, Linus Torvalds.
We’re going to get another leap second at the end of June, and Torvalds doesn’t anticipate any major glitches this time around…MORE (Wired.com)