Inventors' Day

Inventors' Day is a day of the year set aside by a country to recognise the contributions of inventors. Not all countries recognise Inventors' Day. Those countries which do recognise an Inventors' Day do so with varying degrees of emphasis and on different days of the year.

The Inventors' Day (Spanish: Día del Inventor) in Argentina has been celebrated since 1986 and is held yearly on September 29, the birthday of the inventor of the ballpoint pen, László József Bíró.

The Inventors' Day (German: Tag der Erfinder) in the German-speaking countries Germany, Austria and Switzerland is celebrated on November 9, the birthday of the Austrian-born inventor and Hollywood actress Hedy Lamarr whose main invention was the frequency-hopped spread spectrum 1942.

The day was proclaimed by Berlin inventor and entrepreneur Gerhard Muthenthaler. According to the website of the organisation it intends to pursue the following goals:

Hungarian Inventors' Day () is celebrated on June 13 in memoriam of Albert Szent-Györgyi who registered his national patent about the synthesized Vitamin C in 1941. It is celebrated by the Association of Hungarian Inventors (MAFE) since 2009.

Since 1995, the Republic of Moldova has celebrated an Inventors' and Rationalizers' Day annually at the end of June.

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