No founder, sponsoring organisation or establishing record for National Hamburger Day has been documented. Chase's Calendar of Events carried National Hamburger Month in its editions from 1993 to 2007 and listed the day in none of them, while holiday calendars were already carrying it on May 28 in an archived listing from June 2013.
A steak, not a sandwich
Fannie Farmer's Boston Cooking-School Cook Book of 1896 carries a recipe for Hamburg Steaks. Its table of beef cuts files them under the neck and the lower part of the round, with the sirloin and tenderloin kept for steaks and roasts. One of its breakfast menus serves them beside creamed potatoes and white corn cake.
The word hamburger appears nowhere in that book. What a reader in 1896 made was a chopped beef cake, shaped by hand and broiled.


