International V-ATPase Awareness Day is observed worldwide every July 23 to highlight the V-ATPase enzyme and the disorders associated with it. This enzyme functions as a proton pump, crucial for creating acidic environments in cellular compartments, which are necessary for various cellular processes. The day was established by the nonprofit organization V-ATPase Alliance to support individuals and families affected by V-ATPase deficiencies and to advocate for further research into these rare genetic disorders. Conditions related to V-ATPase can lead to severe neurological symptoms, muscle weakness, and other health issues. Notable disorders include osteopetrosis, distal renal tubular acidosis, and X-linked myopathy with excessive autophagy. The observance aims to provide resources and support for affected families, as these disorders are often difficult to diagnose and manage.