Binary clock

True binary clocks also exist, which indicate the time by successively halving the day, instead of using hours, minutes, or seconds.

Binary clocks that display time in binary-coded sexagesimal also exist.

Instead of representing each digit of traditional sexagesimal time with one binary number, each component of traditional sexagesimal time is represented with one binary number, that is, using up to 6 bits instead of only 4.

A format exists also where hours, minutes and seconds are shown on three lines instead of columns as binary numbers.

The clock would show the time in 16 bits, where the smallest unit would be exactly 1⁄65536 day, or 675⁄512 (about 1.318) seconds.

Reading a binary-coded decimal clock: Add the values of each column of LEDs to get six decimal digits. There are two columns each for hours, minutes and seconds.
Both clocks read 12:15:45.
Time Technology's Samui Moon binary-coded sexagesimal wristwatch. This clock reads 3:25.
Binary large-scale electronic clock, designed by the artist Norbert Möslang , to indicate the time of day on 3 lines in hours, minutes, seconds on the face of the main railway station in St. Gallen , Switzerland. Time indicated is 9 o'clock 25 minutes 46 seconds.