The Ice Bucket Challenge, sometimes called the ALS Ice Bucket Challenge, is an activity involving dumping a bucket of ice water on one's head or donating to the ALS Association in the United States. It went viral throughout social media during the Northern-Hemisphere summer of 2014.
The challenge dares nominated participants to have a bucket of ice water poured on their head. One common stipulation gives 24 hours from the time they are nominated to complete the dare; otherwise, the participant is asked to donate money to charity.
The earliest known version of this challenge was known as the "Cold Water Challenge." It was started by the Sheaves For Christ division of the General Youth Division UPCI. A video dated April 26, 2014 by Amado Huizar challenges others to donate 100 dollars to the SFC Missions fundraiser or jump into cold water. Many videos followed of people dumping buckets of water on people's heads.
As with similar challenges, it was usually filmed so footage can be shared online.