Go Purple with a Purpose for Alzheimer's Disease Awareness and Caregivers Month. President Ronald Reagan designated November as National Alzheimer’s Disease Awareness Month in 1983. At the time, fewer than 2 million Americans had Alzheimer’s; today, the number of people with the disease has soared to nearly 5.4 million. Get involved this month, and help raise awareness for Alzheimer’s disease. Mayors in cities around the state are declaring November Alzheimer’s Disease Awareness and Caregivers Month. Click on the links below to view proclamations from around Colorado.