Dutch people like to put everything into their phone calendars and schedule their life with it. I found that although many Europeans stick to the time seriously, no one in other countries sticks to their calendar quite as seriously as the Dutch do. In China, at least in my hometown, it is polite to accept an invitation to dinner immediately. A common way to turn down an invitation is to accept it first and cancel it later with some good reasons.
These days I fully understand this practice and I myself also use the calendar in my phone quite often. It makes me feel more organised and my working efficiency has increased a lot. I guess I will introduce this habit to my friends as well as my colleagues when I go back to my country.