Today, 29 February 2008, the Leap Day, Frederic turns 156 (or 152), though he is yet a hale and hearty man of 38 birthdays.
How do we arrive at this number? (By scribbling arithmetic all over the back of an interlibrary loan request form while I should have been filling out said form for research purposes, naturally.) Well, Frederic declares to Mabel that ‘In 1940 I of age shall be,’ referring to his 21st birthday, at which point he would have lived 88 years. But, you say, there are four years between leap years, and 21 times 4 is 84, so how do we get 88? Because 1900 was not a leap year. It is not clear whether Gilbert and Sullivan were under the misapprehension that it was. If they believed it was, then Frederic would have been born in 1856 and celebrated his eleventh birthday on the nonexistent day of 29 February 1900. But since 1900 did not contain an intercalary day, Frederic would of necessity have been born in 1852, thus making him 88 in 1940 and 156 today, his 38th birthday. (That 1900 did not contain a leap year is the reason the old Macintosh system epoch was chosen for 1 January 1904, to ’save a half dozen instructions in their leap-year checking code.’) On the other hand, if Frederic did somehow manage to celebrate a birthday in 1900, then he would have been born in 1856, and the multiplication would come out all nice and pretty to 84 years on his 21st birthday in 1940.
I find it hard to believe that G&S would have let poor Frederic live eight years between his eleventh and twelfth birthdays (1896 and 1904); therefore they must have erroneously believed that 1900 was a leap year and set his birthday in 1856. Then again, I also find it hard to believe that everybody would just take Ruth at her word when she reveals that the pirates are in fact simply fallen noblemen, so what do I know. However, the canon evidence, such as it is, is that Frederic celebrates his 21st birthday in 1940, making today his 38th birthday. He is therefore 156, or possibly 152, more or less (but rather less than more).
How quaint the ways of Paradox!


