International Microorganism Day is celebrated on the 17th September. This day is an opportunity to promote the diversity and variety of microorganisms. It is a way to encourage everyone to recognize and celebrate the many ways microscopic organisms are important in human health, culture and, throughout our daily lives.  

In 2020 and 2021, due to the coronavirus pandemic, International Microorganism Day took an online format, with a 24-hour live stream. This was broadcasted in different social media platforms and all the recordings of the day can be found at the International Microorganisms Day YouTube channel.