30 Hour clock

It was funny how my fathers friend missed train he had reserved for to attend my sisters wedding. He reserved for the train leaving a Saturday night from Alwaye station. Time of departure: Late night. Precisely, 12:40 midnight

He goes there with family to board the train on Saturday night, checks the reservation chart and his name was not there. Ticket looks perfect. Date is correct, train is correct. Why this happened? Railway officials explained that his train actually left already. Saturday early morning 00:40. Or Friday night 12:40.

The 24 hour clock did not help him. I always get into confusion when I setup meetings on Outlook calendar. 12:30 is noon or late night??

I have found the way TV Program listings in Japan solved the issue very interesting. They have a clock starting 06:00 Hrs running till 30:00 Hrs. For guys who want to stay late and watch TV, they don't have to turn back the page. Worldcup match on Jun 17 in Germany do not get live broadcast on Jun 18 (01:00AM), but on the same day, Jun 17, but at 25:00 Hrs. This is not just interesting, it is really useful. Why the hell is day changing so stealthily in the mid of the night, when everyone is supposed to be sleeping and nothing specific happens in nature - other than so many clocks will be striking in full length disturbing people who want to enjoy a nice sleep? Who designed this clock?

I guess the early middle-east clock was correct. Sun set. Day closed. A new day. If there is a new moon, a new month too. The first twelve hours is what we call night. The second 12 hours will be what we call the day. That's why Jesus asked "Are there not 12 hours in a day?" For the normal 12 hour clock, mid of the clock is either mid of the day or mid of the night. If you offset the 30 Hrs Japanese clock to start at 00:00, you get back to this.

I have read about how calendars were evolved and invented, how Christmas was created in December etc. Never heard about who created the stealth clock that changes day in the mid of the night. Can anyone help me?