World Blood Donor Day
This international day raises awareness about the importance of donating blood to save lives. It honors the birthday of Karl Landsteiner, who discovered blood groups and made transfusions safer. The event celebrates the selfless act of voluntary donors and encourages more people to donate, ensuring enough blood supply for emergencies.
- Global Release
- First Release May 28, 2026
- Jun 11 → Jun 14 Annually
- Stamp Series International Days
- https://en.wikipedia.org/wiki/World_Blood_Donor_Day
All Slowly stamps are hand-drawn by illustrators.
The stamp description may contain AI-generated text and inaccuracies. It is provided for reference only, primarily sourced from Wikipedia, UNESCO, and other reliable references.
Report an issue
The stamp description may contain AI-generated text and inaccuracies. It is provided for reference only, primarily sourced from Wikipedia, UNESCO, and other reliable references.