"The 24h time notation specified here has already been the de-facto standard all over the world in written language for decades. The _only_ exception are a few

"The 24h time notation specified here has already been the de-facto standard all over the world in written language for decades. The _only_ exception are a few English speaking countries, where still notations with hours between 1 and 12 and additions like “a.m.” and “p.m.” are in wide use." Wierd fact : some African countries close to the equator have time from 0 - 12 as the hours of daylight. 02:00 is what most people represent as 08:00 If something states a train leaves at 02:00, ask what that means. Iso is not ambiguous, but be careful not to miss the train until we have world wide adoption. Technically "The only exception are a few English speaking countries" is incorrect.