St. Geoffrey's day, in 18th century English slang, meant never - since there was no Saint named Geoffrey. Or was there? In the 1811 Dictionary of the Vulgar Tongue we find the following definition:
Saint Geoffrey's Day: Never, there being no saint of that name; to-morrow-come-never, when two Sundays come together.
Unfortunately, the slang-speakers of 19th century England were misinformed. St. Ceolfrith (Geoffrey in modern English), of Wearmouth and Jarrow, is commemorated on the date of his repose, September 25/October 8 (the difference in dates is based upon the calendarial changes since his martyrdom). There is also a mystery novel based upon the traditional cricket game played upon St. Geoffreys day: Osmington Mills "No Match for the Law" (Bles, 1957).