That sounds similar to the Ethiopean time-system: * https://www.pri.org/stories/2015-01-30/if-you-have-meeting-ethiopia-you-better-double-check-time https://ww

That sounds similar to the Ethiopean time-system: * https://www.pri.org/stories/2015-01-30/if-you-have-meeting-ethiopia-you-better-double-check-time https://www.pri.org/stories/2015-01-30/if-you-have-meeting-e... "Because Ethiopia is close to the Equator, daylight is pretty consistent throughout the year. So many Ethiopians use a 12-hour clock, with one cycle of 1 to 12 — from dawn to dusk — and the other cycle from dusk to dawn. "