How do people treat being late for work in companies in America, Germany and Japan?

Most companies in Germany and the United States have different degrees of flexible working system. In Germany, the working hours are 35 hours a week. Every day from 10 to 2 pm is called "core working hours". Generally speaking, you can arrive before 10, and you can make flexible personal arrangements after 2 pm without anyone's consent. If you don't come on the same day or only work for two hours, just say hello to your immediate leader. It is allowed to arrive at the company at 6 o'clock as early as possible and at 1 1 at the latest, and the working hours per day are not allowed to exceed 10 hours. Everyone has a time account, and every minute spent in the company will be recorded in the account (punching in and out), and then 7 hours will be deducted every working day. As long as your time account is between -20 and +30, you can arrange it yourself. For example, working 9 hours a day a week, as long as you say hello to the leader, you can not come on Friday. It is completely arbitrary and flexible. Some people in the company like to come at 7 o'clock and leave early every day, while others come 10 every day.

Overtime is rare, and it has nothing to do with the company after work. I have never seen anyone working overtime on weekends or holidays. In theory, the working hours of American companies are fixed every day, but it feels that people come from 7 to 9 because the atmosphere is more casual. There is no statistics on working hours at all, but everyone has his own job and it is almost endless, so the working hours are basically more than 40 hours.

Some people who work a lot often work overtime, or they will work overtime on weekends, but overtime hours don't count. It feels like a matter of conscience. For example, I work overtime at Christmas to do projects, and I work 15 hours every day for several days. It is very casual to ask for leave with the leader in the back. Other colleagues have worked overtime, but they have also worked silently. Everyone's salary is almost fixed, but good work will affect the bonus. There is a big gap between different industries and different companies, so it is not easy to compare.