Both 12 and 60 are superior highly composite numbers^[1] which makes mental math easy. 60 in particular is a very nice number because it has 12 divisors and is the smallest number divisible by all the numbers 1 through 6.

Pair it with International Fixed Calendar and I’m on board.

Neat but holy good fucking god the amount of programming it would take if it was ever decided to change this going forward, not to mention how historical times would be referenced. Datetime programming is already such a nightmare.