That rule about months without the letter R was never taken all that seriously
In 1599, William Butler called it “unseasonable and unwholesome” to eat oysters during months without the letter R. His claim, based on an old myth, wasn’t uncalled for: New York oysters begin spawning when the water warms up (May) and the time off would give them time to grow. As a conservation measure, the rule became a law in 1715, banning the collection from oyster beds. The law was suspended in 1807. Almost 50 years later, Mayor Henry Wood tried to reinstate the restriction in response the 1854’s cholera panic. But by 1855, New Yorkers were over the scare -- and so obsessed with oyster consumption -- they jokingly turned August into Orgust (these guys with the names).
Like all good things in New York, the locals ruined the oyster beds
By 1910, oyster bed populations were declining rapidly due to increased overfishing and water pollution (600 million gallons of untreated sewage were being dumped into New York City water every day). Even still, it took the government until 1927 to officially shut down the last of the city’s oyster fisheries.