I do not make a habit of marking the birthdays of motorcycle racers, but Valentino Rossi's 40th is worthy of an exception to my self-imposed rule. His 40th birthday is clearly a milestone, though any birthday can hardly be regarded as an achievement. To reach his 40th birthday, all Rossi had to do was keep living.
But of course, the fuss being made of Valentino Rossi's 40th birthday is not because of the age he has reached. It is because he reaches the age of 40 a few months after having finished third in the 2018 MotoGP championship, racking up five podiums and a pole position along the way. It is because the media, his fans, and Rossi himself regard that as a disappointing season.
It is because he enters his 24th season of Grand Prix racing, and his 20th in the premier class, the first year of a two-year contract which will see him racing until the age of 41 at least. It is because he is one of the leading favorites to wrestle the MotoGP crown from reigning champion Marc Márquez (15 years younger), along with Jorge Lorenzo (9 years younger), Andrea Dovizioso (8 years younger), Maverick Viñales (16 years younger).