World Alzheimer’s Day is observed on 21 September, during World Alzheimer’s Month in September. Alzheimer’s Disease International uses the date to raise understanding of Alzheimer’s disease and other forms of dementia, including among families and carers managing changes in memory, behaviour and independence.

The 2026 campaign theme is “The Earlier You Know, The More You Can Do: A Dementia Diagnosis Matters”. ADI ties the message to stigma, discrimination and the fact that a timely diagnosis can open access to support, planning and, where they exist, treatments and clinical trials.

Occasional forgetfulness does not automatically mean dementia. Persistent difficulties that affect everyday activities should be discussed with a medical professional. Assessment may also identify other treatable causes; when dementia is involved, it allows care to be organised earlier.

Stigma can lead people to hide symptoms or delay seeking advice. Carers need information, respite and suitable services. The day does not replace medical guidance and is not a diagnosis by campaign.

Also on 21 September, ADI launches the World Alzheimer Report 2026, focused on dementia clinical trials. The announced webinar, from 14:00 to 15:15 BST, discusses what participation means for a person living with dementia and what trials may bring for diagnosis and care. The report should not be read as an individual treatment guide.

The World Health Organization describes dementia as a growing public-health issue, with effects on people, families and care systems. This account does not add global statistics without a year and method from the WHO fact sheet.

National associations organise memory walks, fundraisers and local campaigns around the date. They complement clinical services; they do not replace them.

The 2026 message remains practical: early diagnosis does not by itself cure, but it can change what can be done — for the patient, for the family and for those who provide long-term care.

Photo: Rhoda Baer, public domain (NIH / Wikimedia Commons). An outdoor couple; an illustrative photograph, not identified patients. Cropped to 16:9.

Source consulted: World Alzheimer’s Month (Alzheimer’s Disease International); Dementia (WHO fact sheet).