World Aspergillosis Day is observed worldwide every February 1 to support patients affected by aspergillosis, a fungal infection primarily impacting the lungs and causing over half a million deaths annually. The observance was initiated by patients at the National Aspergillosis Centre in Manchester, United Kingdom, and has grown into a global campaign since its first celebration in 2018. Activities on this day include sharing personal stories online using the hashtag #WorldAspergillosisDay, learning about the disease, and donating to organizations that fund research and support for patients and their families. Individuals are also encouraged to have their lungs checked, even if they are not in a high-risk group, as many lung diseases can go unnoticed. The day aims to highlight the importance of recognizing and treating this serious condition, which can develop in individuals with compromised immune systems or existing lung diseases.