Well been looking into this and that 12 hours AM/PM format is illogical and very confusing. The 24 hour standard ISO format (2018-05-14 15:22:34) on the contrary is logical, simple to understand, cannot be misinterpreted and a 100 times easier to work with in programming.

https://www.reddit.com/r/AskReddit/comments/32bgkb/why_doesnt_the_civillian_world_use_24_hour_time/