The correct answer is 14 June. World Blood Donor Day is celebrated annually on June 14. It is celebrated to raise awareness about the need for safe blood and blood products and also to thank blood donors for their life-saving noble act. The theme for 2022 is 'Blood donation is an act of solidarity. Join the effort and save lives. 'The day marks the birthday of Karl Landsteiner who discovered the ABO blood group system in 1901. Additional Information? List of Some important days in June 2022:? DaysEvents1st June World Milk DayGlobal Parents Day4th JuneInternational Day of Innocent Children Victims of Aggression5th JuneWorld Environment Day7th June World Food Safety Day12th June World Day Against Child Labour14th June World Blood Donor Day17th June World Day to Combat Desertification and Drought20th June World Refugee Day21st June World Hydrography DayInternational Yoga DayWorld Music day