No documented founder or formal establishment record has been identified for National Laundry Day. It circulates as an unofficial April 15 observance on online holiday listings and is promoted seasonally by laundry, dry-cleaning, and appliance businesses.
A weekly ritual built around a board
For most of the nineteenth century, getting clothes clean meant a washboard. Stephen Rust patented a fluted metal washboard in the United States in 1833, a ridged surface set in a wooden frame. Clothes were soaked, soaped, then rubbed up and down against the ridges until the dirt loosened. The work was heavy enough that households gave it a fixed slot in the week rather than fit it in anywhere.
That slot was Monday. Washing on the Victorian "wash day" gave clothes the rest of the week to dry, be pressed, and be folded before Sunday. The whole household calendar bent around the wash.



