About WMDD

World Marrow Donor Day (WMDD) is a special day celebrated once per year to thank all blood stem cell donors worldwide. We thank unrelated donors, family donors, cord blood donors, donors who already have donated, and donors who are on the global registry waiting to donate.  It is also a day to raise awareness among the general public and decision-makers about the importance of registering as a stem cell donor and the impact of blood stem cell transplantation on a patients’ life.

WMDD is celebrated all over the world on every 3rd Saturday of September, in 2021 it falls on September 18th. The event will be celebrated in more than 50 countries on all continents reaching hundreds of thousands of people through social as well as conventional media coverage. Get inspired and re-live previous editions on our WMDD memories page.

Events worldwide

 WMDD targets primarily the general public, but also seeks to raise awareness among policymakers, public authorities, industry representatives, researchers, health professionals and anyone who has a genuine interest in blood stem cell donation and blood stem cell transplantation.

This website includes information about WMDD events happening around the world, how to register an event and submit international donor/recipient stories.

September 16, wmdd 2017

All forms of participation for WMDD, big or small, are encouraged. Be creative and let your heart speak. Take thank you pictures with your team or donors and post them on social media or websites. WMDD would not be possible without the continuous efforts of organisations around the world, building awareness locally in order to achieve a potential donor for each patient.


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Our partners

WMDD is supported by two international organisations, WMDA and EBMT. These two organisations are professional societies active in the field of blood stem cell/marrow transplantation.

 WMDA established a task force that initiated WMDD and shared ideas about WMDD as well as develop and provide toolsets that help organisations celebrate WMDD.
 The EBMT is a non-profit organisation that allows scientists and physicians involved in clinical bone marrow transplantation to share their experience and develop co-operative studies.



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