World Alzheimer s Day is observed every year on September 21. The day is dedicated to the progressive neurologic disorder Alzheimer s. The disease is an untreatable, progressive brain disorder that slowly robs people of their memory, thinking abilities, and ultimately their capacity to complete even the most basic tasks. World Alzheimer s Day 2022 — Understanding the Basics: What Does This Neurologic Disorder Look Like? How Long Can a Person Live with Alzheimer’s? Everything You Need to Know.