Sixty-nine years before the publication date, on April 1, 1948, the U.S. Postal Service officially incorporated hyphens into the cancellation stamp for what had previously been called "Croton on Hudson." This transition is documented through a pair of commemorative envelopes known as "last/first covers," which were inscribed by Augustus W. Dymes, Jr., who served as the local postmaster and was the uncle of Dorothy Pezanowski, the village's current historian.

In philatelic terminology, a cachet refers to "a printed or stamped design or inscription (other than a cancellation or pre-printed postage) on an envelope, postcard, or postal card to commemorate a postal or philatelic event."

An earlier significant milestone in the town's postal history occurred on July 4, 1891, when the service officially changed the post office name from Croton Landing to Croton-on-Hudson, according to records from The Highland Democrat.