Clock, horn, or light?

[Mark Dexter]

Originally posted by rulesmaven

When they start the clock at the beginning of a half, it immediately ticks down from 20:00 to 19:59 in an instant, even though a full second has not truly elapsed from the game.

Not necessarily - some clocks actually wait a second before switching over.

Of course, the only way to really know which way the clock runs is to be running it yourself - it's hard to tell from watching a game exactly when the timer pushes the "start clock" button.