European Mushroom Day
European Mushroom Day is held on September 23. Celebrated on the fourth Saturday of September. This event in the third decade of the month September is annual. 
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The objectives of the European Mushroom Day:
• Increase of the popularity of mushrooms
• Intensification of the knowledge about mushrooms
• Promotion of the mushrooms as hobby for youths
• Central announcement of mycological events at this day
• Protection of habitats of rare fungal species
• Preservation of traditional folk names of mushrooms in the languages of the world
Similar holidays and events, festivals and interesting facts
World Protection Elephant Day on September 22
World CML Day on September 22 (Since 2008, patient organizations around the world have initiated events and projects on "CML Awareness Day" on September 22 to raise awareness of the needs of patients living with Chronic Myeloid Leukemia);
World Rhino Day on September 22
International Mixed Berries Muffin Day on September 22
Astronomy Day on September 22 (autumn);
World Rose Day on September 22
International Mime Day on September 22
National Elephant Appreciation Day in USA on September 22
Day of Combating the Non-Completion of Secondary School Children on September 23
International Rabbit Day on September 23 (Held on the fourth Saturday in September);
International Day against Sexual Exploitation and Trafficking of Women and Children on September 23 (is celebrated every 23 September. It was jointly established by the World Conference of the Coalition against Trafficking in Persons and the Women’s Conference that took place in January 1999 in Dhaka, Bangladesh);
International Day of Sign Languages on September 23 (adopted by the UN on November 14, 2017);
National Public Lands Day in USA on September 23 (Held on the fourth Saturday in September);
World Rivers Day on September 24 (last Sunday of September);
World Retina Week on September 24
World Retina Day on September 24 (Held on the last Sunday in September);
World Day Against Software Patents on September 24 (Brussels, 2nd September 2008 — A global coalition of more than 80 software companies, associations and developers has declared the 24th of September to be the “World Day Against Software Patents”);
World Cancer Research Day on September 24
Bladder Cancer Awareness Walk in Canada on September 24 (This charity event began in 2006. It takes place every year on the fourth Sunday in September)