National Day

National Sourest Day

Celebrated on 10/25/2026

Quick Fact

National Sourest Day, celebrated on October 25th, is the perfect excuse to pucker up with your favorite tart treats. Did you know that the world's sourest candy, Toxic Waste, has a sourness level that can make even the bravest candy lover wince? This day encourages everyone to embrace the sour side of life, from lemon drops to sour pickles.

Origins and Establishment of National Sourest Day

National Sourest Day was created in 2015 by the confectionery company Ferrara Candy Company, known for producing popular sour candies like Lemonhead and Sour Patch Kids. The company aimed to establish a day dedicated to celebrating the unique and bold flavor of sourness, which had gained a dedicated following among candy enthusiasts. The date October 25th was chosen to fall during the fall season, a time when many sour fruits like apples and cranberries are harvested, and to precede the holiday candy rush.

Evolution and Modern Commemoration

Since its inception, National Sourest Day has grown from a marketing initiative into a broader cultural celebration. Candy manufacturers, bakeries, and restaurants now offer special sour-themed products and promotions. Social media plays a significant role, with fans sharing recipes for sour cocktails, desserts, and snacks using hashtags like #NationalSourestDay. The day has also inspired challenges, such as eating the sourest candy in one sitting, and has become a fun, informal holiday for those who enjoy tangy flavors.

Facts & General Observations

  • The world's sourest candy, according to the Guinness World Records, is "Toxic Waste Hazardously Sour Candy," with a pH level of 1.8, comparable to battery acid.
  • Sourness is detected by taste buds that respond to acidic compounds, and it can trigger a pleasurable endorphin release in some people, similar to the thrill of eating spicy foods.
  • The sour candy market in the United States was valued at over $1.5 billion in 2020, with Sour Patch Kids being one of the top-selling brands.

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