June 10th, 2025
Ballpoint pens are one of the most useful writing implements around. They replaced the fountain pen, making pen usage more convenient and less messy. National Ballpoint Pen Day commemorates the anniversary of the ballpoint pen patent filing on June 10th of 1943.
Source: www.pens.com/blog/national-ballpoint-pen-day-is-write-around-the-corner/