Time and ANTICLOCKS

If you ask yourself what ‘time’ is, you know it. But if you have to explain it to someone else, you do not know. This is a statement of a philosopher which is already 2000 years old. The simplest modern definition comes from Albert Einstein who said, that time is what a clock shows. This is very pragmatic statement, but one does not know better. The concept of time is trivial: Any periodic system can be used and is used for time measurement.