National Glazed Spiral Ham Day is observed worldwide on April 15, celebrating the savory dish of glazed ham, which is commonly associated with holidays like Christmas and Thanksgiving. The tradition of glazed ham in the United States began in the 1940s, when a recipe for this dish was published in a local newspaper. The term "spiral" refers to a slicing technique invented by Harry J. Hoenselaar in 1957, who created a tool for this purpose in his basement and later founded the HoneyBaked Ham company, which now operates over 400 stores nationwide. On this day, people may prepare glazed ham using various recipes that typically include ingredients like sugar, honey, or orange juice, though other glazes such as mustard or maple syrup can also be used. The celebration honors the versatility and popularity of glazed ham as a hearty dish enjoyed by many.