Zipper Day is held every April 29 to recognize the 1913 patent issued to Gideon Sundback for a “hookless fastener.” Other inventors had created similar products since the mid 1800s, but it wasn’t until Sundback’s invention was used on a new line of galoshes that they got the name “zipper” in 1923. After that, it seems it was plain sailing for this common fastener.
“Your gates will be open continually;
They will not be closed day or night,
So that men may bring to you the wealth of the nations,
With their kings led in procession.”
April 29 is also International Dance Day!