National Kettlebell Day is celebrated on January 12 to honor the kettlebell, a cast iron or cast steel weight resembling a cannonball with a handle. This day aims to promote the kettlebell as a versatile fitness tool used for various activities, including sports and strength exercises. The celebration encourages more people to embrace kettlebell training without fear. The kettlebell's origins are often linked to Russia, where it gained popularity in the 18th century, although similar tools have been used in various cultures throughout history. Initially utilized by farmers as counterweights, the kettlebell evolved into a recognized fitness tool, especially showcased by circus strongmen. Despite a decline in popularity in the mid-20th century, kettlebell training saw a resurgence in the Soviet Union, where sports schools were established.