Abstract
The anniversary of a personality is always an expected, joyful, pleasant and at the same time sad event. Expected because the hero of the day knows – it will definitely happen. Joyful because the hero of the day sums up his long scientific activity, and analyzing the path he has traveled, he is satisfied that he was able to implement many of his ideas and plans both in science and in his personal life. Pleasant because the hero of the day knows that these days he will hear a lot of interesting and beautiful words from his colleagues, colleagues, students, friends and family members. It's sad because he realizes that years pass, while time is fleeting and there is no stopping him, but at the same time he can still and wants to have time to do something useful for his family and the people around him.