World Alzheimer’s Day: September 21st

World Alzheimer’s Day is observed each year on September 21st to raise awareness of Alzheimer’s disease and other forms of dementia. As part of World Alzheimer’s Month, this global day of action unites communities, families, medical professionals, and advocacy groups to highlight the importance of early diagnosis, support, and education.

Every three seconds, someone in the world develops dementia — a powerful statistic shared by Alzheimer’s Disease International (ADI), the organisation behind this awareness campaign. On this day, cities and landmarks are lit up in purple, the symbolic colour of the movement, to honour those affected and to show global solidarity.

Key Facts About World Alzheimer’s Day

A Brief History of World Alzheimer’s Day

World Alzheimer’s Day was first marked in 1994, coinciding with the 10th anniversary of Alzheimer’s Disease International (ADI). As the leading global federation of Alzheimer associations, ADI works closely with the World Health Organization (WHO) to lead education, research, and policy-making around dementia.

What began as a single awareness day grew into World Alzheimer’s Month, providing an extended opportunity for local and national organisations to host events, launch campaigns, and share resources.

How to Get Involved in World Alzheimer’s Day

• Wear purple – Show your support by wearing the official colour of Alzheimer’s awareness
• Join an awareness event – Attend walks, webinars, or fundraisers hosted by ADI, Alzheimer’s Society, or local health groups
• Donate – Support organisations such as ADI or The Purple Elephant to fund research and support services
• Educate yourself – Learn how to support someone living with dementia through reliable resources
• Light up landmarks – Join or organise local efforts to illuminate buildings in purple

Frequently Asked Questions

What is Alzheimer’s disease?

Alzheimer’s disease is the most common form of dementia, causing problems with memory, thinking, and behaviour. It is progressive and currently has no cure, although early intervention can improve quality of life.

What’s the difference between Alzheimer’s and dementia?

Dementia is an umbrella term for symptoms that affect memory and cognitive function. Alzheimer’s is a specific disease that accounts for 60–70% of dementia cases.

Why is purple the colour for Alzheimer’s awareness?

Purple represents dignity, strength, and hope — qualities that reflect the Alzheimer’s community and its ongoing fight for a cure and better care.

How can I support someone with Alzheimer’s?

• Be patient and offer reassurance
• Create a calm, structured environment
• Help them maintain routines
• Use simple language and visual cues
• Seek professional support if needed

Future Dates for World Alzheimer’s Day

Hashtags for World Alzheimer’s Day

• #WorldAlzheimersDay
• #EndAlzheimers
• #KnowDementia
• #GoPurple
• #WorldAlzMonth
• #TogetherWeCan