World Alzheimer’s Day
A global awareness day for Alzheimer's disease and other dementias, held on 21 September each year.
- UK
- USA
- Ireland (not marked)
- Canada
- Australia
- New Zealand (not marked)
- UAE and Gulf
- International
About the day
Alzheimer's Disease International first marked World Alzheimer's Day on 21 September 1994. It is the focal point of World Alzheimer's Month in September. ADI often launches its annual World Alzheimer Report on the day.
2026 theme
The Earlier You Know, The More You Can Do: A Dementia Diagnosis Matters
The 2027 theme has not been announced yet.
Dates for the next three years
| Year | Date | Where | Status |
|---|---|---|---|
| 2027 | Tuesday 21 September 2027 | UK, USA, International, Canada, Australia, UAE and Gulf | Same date every year |
| 2028 | Thursday 21 September 2028 | UK, USA, International, Canada, Australia, UAE and Gulf | Same date every year |
| 2029 | Friday 21 September 2029 | UK, USA, International, Canada, Australia, UAE and Gulf | Same date every year |
Questions and answers
When is World Alzheimer’s Day 2027?
World Alzheimer’s Day 2027 is on Tuesday 21 September 2027. It falls on the same date every year.
Who organises World Alzheimer’s Day?
World Alzheimer’s Day is organised by Alzheimer's Disease International.
When did World Alzheimer’s Day start?
World Alzheimer’s Day was first held in 1994.
Where is World Alzheimer’s Day marked?
World Alzheimer’s Day is marked in the UK, the USA, Canada, Australia and the Gulf, and internationally.
Where do these details come from?
We checked these details against three sources, including Alzheimer's Disease International, FAQs. They were last checked on 19 October 2026.
Where this information comes from
- Alzheimer's Disease International, FAQs
- Alzheimer's Disease International, our history
- Saudi Ministry of Health: World Alzheimer's Day 2026
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