World Temperance Day is observed worldwide every October 3. This day aims to promote the temperance movement, encouraging individuals to consume alcohol in moderation or abstain entirely. Sometimes it is referred to as No Alcohol Day, but that day officially takes place at October 2.

The temperance movement originated in late 17th-century North America, initially advocated by Native Americans and later supported by Methodist and Calvinist ministers. The first temperance society in North America was established in 1819, and the movement gained momentum during the Second Great Awakening, leading to the formation of the Prohibition Party in 1869.

Observances of this day may include learning about the temperance movement, watching documentaries, or taking a pledge to abstain from alcohol. The day coincides with World Alcohol-Free Day, which is promoted by Movendi International, a global social movement advocating for abstinence from alcohol and other drugs.