[idlewords]

That used to be true (twice a day, even), but now it just flashes 12:00, or the screen is dead.

[caf]

A clock that flashes 12:00 is still right twice a day.

[glenneroo]

Unless you live in a country which uses 24-hour clocks, which is most of the world.

Source: https://en.wikipedia.org/wiki/Date_and_time_representation_b...

[caf]

Do unset clocks flash 12:00 in locations that use 24-hour clocks, or do they flash 00:00?

[glenneroo]

I can't honestly say I ever paid attention, but I just checked all clocks I could find, one flashes 00:00 and the other 0:00. Most if not all clocks I've used had a 12 or 24-hour mode, not sure what happens if you set to 12-hour and unplug it (probably just reset to defaults).

[idlewords]

Flashing is an error condition.

[justinjlynn]

Indeed, a broken modern digital clock is likely to just be blank.

[Kliment]

So it's correct at 12 and possibly at midnight too