The Director of Music writes:

We should all go round whistling something from William Tell or the Barber of Seville today, as it’s Giaochino Rossini’s birthday.

As far as I know, he is the only composer to have been born on 29 February. Not counting all the ‘substitute’ birthdays on February 28, how many birthdays would he have celebrated – or, how old would he have been today ?