According to this, AD39 was a common year which started on a Thursday.
According to this, Pier 39 is a shopping centre and tourist attraction built on a pier in San Francisco. I think I may have seen it in films.
39 is the ANSI and DOS character code used to display an apostrophe.
It is a prominent number of steps in a certain novel.
It is the atomic number of the chemical element Yttrium; obtained from monazite, xenotime and yettriac; used in colour televisions and radars; and named after this place.
And as of today, 39 is the age I am most likely to be for the next 365 days. As my new age, also starting on a Thursday, it has made me quite cross. This annual crossness has become a tradition.
Come back 38. All is forgiven. Well some is. Perhaps you weren't so bad after all.
Quel age avez-vous? J'ai ' ans.
Never mind. It has earned me two t-shirts, a £20 cheque and a leather man-bag.
Happy bloody birthday.