Time coming and going relative to midnight ...

Metronome is a large public art installation located along the south end of Union Square in New York City.

On the left side of the work is a set of fifteen large LED digits, called "The Passage", which display the time in 24-hour format. The seven leftmost digits show the time in conventional 24-hour format, as hours (2 digits), minutes (2 digits), seconds (2 digits), tenths of a second (1 digit). The seven rightmost digits display the amount of time remaining in a 24-hour day, as tenths of a second (1 digit), seconds (2 digits), minutes (2 digits), hours (2 digits).

On the right side: "The Infinity" and "The Source" - a sphere, half black and half gold, which turns daily in synchrony with the phases of the moon. When the moon reaches fullness, the entire golden face of the orb is revealed.

The brick wall is built in concentric circles, gold leaf accentuates the center of the work, a dark aperture that emanates a constant halo of steam. At noon and midnight the hole erupts with a huge plume of steam that is accompanied by an explosion of sound composed to mark the exact instant and its passage, like a noonday whistle or a public clock that marks the time.

Metronome contemplates time: geological, solar, lunar, daily, hourly, and momentarily, revealing the fractions of seconds in the life of a city – and of a human being.

en.wikipedia.org/wiki/Metronome_(public_artwork)