https://www.nationaldaycalendar.com/.image/ar_16:9%2Cc_fill%2Ccs_srgb%2Cg_faces:center%2Cq_auto:eco%2Cw_1920/MjA1OTg5OTk2ODkxNDgxNDM0/website-feature---national-zipper-day--april-29.webp National Zipper Day commemorates April 29, 1913, when the patent for the modern zipper was issued. The day celeb...