Every single clock, even those that are air gapped. Countdown timers lose a minute, stopwatches add a minute. Biological clocks aren’t affected.
Every single clock, even those that are air gapped. Countdown timers lose a minute, stopwatches add a minute. Biological clocks aren’t affected.
Astronomers would notice immediately, as the stars would be in very wrong positions. The IAU is the primary reason why IT people have to hack around leap seconds.