Earlier quoted context omitted.
Personally, I wish everyone used the 24:00 clock. Maybe the military has messed me up, but I really prefer seeing something like 18:22 over 6:22pm. It just seems simplier.
I cannot tell you the number of times in my life that a 12 hour clock has lead to a _major_ fuckup. I run all my personal clocks on 24hr to prevent said fuckups, but somehow I still feel weird telling people a meeting is at 15:00 in an email.
It feels weird because you think people will think it's weird. You're probably right.
Personally I use a 24-hour representation and convert it to 12 when communicating with others.
11:59AM -> 12:00PM, 11:59PM -> 12:00AM caused me mental discomfort for a long time. A 24-hour clock made a lot more sense, but it doesn't seem like most other people have a problem with 12.
They'd rather you used "normal" time. If you want to fight that battle go for it. I believe you're right.
Next: Date format!