National Biodiesel Day

Celebrated on 03/18/2026

Quick Fact

Biodiesel, made from renewable resources like vegetable oils and animal fats, reduces carbon dioxide emissions by up to 74% compared to petroleum diesel. National Biodiesel Day is celebrated on March 18th, the birthday of Rudolf Diesel, the inventor of the diesel engine, who originally designed it to run on peanut oil.

Origins and Establishment of National Biodiesel Day National Biodiesel Day was established to honor the birthday of Rudolf Diesel, born on March 18, 1858. Diesel envisioned his engine running on a variety of fuels, including vegetable oils, and demonstrated it at the 1900 World's Fair using peanut oil. The day was officially recognized to promote awareness of biodiesel as a sustainable alternative fuel, with the National Biodiesel Board leading efforts to celebrate it annually since the early 2000s.

Evolution and Modern Commemoration Over the years, National Biodiesel Day has grown from a niche observance into a nationwide event supported by industry groups, government agencies, and environmental organizations. Celebrations include educational workshops, biodiesel vehicle displays, and community events highlighting the fuel's environmental benefits. Today, it serves as a platform to advocate for renewable energy policies and to recognize advancements in biodiesel production, such as the use of waste oils and algae.

Facts & General Observations - Biodiesel is the first and only commercial-scale fuel produced across the U.S. to meet the EPA's definition of an Advanced Biofuel. - The U.S. biodiesel industry produced over 2.6 billion gallons in 2023, supporting more than 60,000 jobs. - Using B20 (a blend of 20% biodiesel with 80% petroleum diesel) can reduce particulate matter emissions by up to 20%.

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