On Fri, 3 Sep 2021, Greg 'groggy' Lehey wrote:
The other reference, of course, is Gilbert and
Sullivan's "The Pirates
of Penzance", where Frederic, the hero, was born on 29 February 1860 and
apprenticed to a band of pirates until his 21st birthday (a paradox: 29
February 1940).
Yes, that one is a classic; he could only celebrate his 21st every 4
years...
-- Dave