World Cactus Day
World Cactus Day is held on May 10. This event in the first decade of the month May is annual. 
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World Cactus Day on May 10th has its origins in America and celebrates the thorny companions that have more and more fans in Germany and Europe - but it also reminds us that many cacti in their homeland are in danger of extinction.
Similar holidays and events, festivals and interesting facts
World Moscato Day on May 9 (Moscato, or Muscat in Italian, is one of the oldest known variety of grapes grown in the world);
Europe Day, commemorating the Schuman Declaration. on May 9 (European Union);
International Dixieland Festival Dresden on May 9 (starts on the second Sunday in May, but sometimes the date can vary);
World Lupus Day on May 10
World Melanoma Day on May 10 (is recognized on the second Monday of May around the world to highlight the growing prevalence of malignant melanoma);
International Argania Day on May 10
World Poultry Day on May 10
International Awareness Day for Chronic Immunological and Neurological Diseases on May 12
World Fibromyalgia Awareness Day on May 12 (Fibromyalgia is a complex of disorders and causes bone and muscle pain. This is a chronic disease that affects approximately 2-5% of the world's population)