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.
Around 1000AD there were no real clocks yet though. Spring driven clocks appeared in the 1500’s and pendulum clocks in 1656