A secondary source cites December 10, 1931 as the date Addams became the first American woman awarded the Nobel Peace Prize.
While the Nobel Foundation's official records identify December 8, 1931, as the date Jane Addams's Nobel Peace Prize was announced/awarded, at least one secondary source—the InterExchange retrospective on Addams as the "Mother of Social Work"—cites December 10, 1931 as the relevant date for this achievement.
This discrepancy likely arises from the fact that the Nobel Peace Prize is traditionally presented in Oslo, Norway, while the other Nobel Prizes are presented in Stockholm, Sweden, both historically associated with December 10, the anniversary of Alfred Nobel's death. Because Addams did not travel to accept the award in person due to declining health, the exact sequence of announcement versus ceremonial dates can vary between sources describing the honor.
Regardless of the precise date, the substance of the achievement is undisputed: Jane Addams became the first American woman to receive the Nobel Peace Prize, a landmark recognition of her lifelong dedication to pacifism, women's rights, and social reform. This honor cemented her international reputation and remains one of the most significant achievements of her career, symbolizing the growing (if still limited) recognition of women's contributions to global diplomacy and social progress in the early twentieth century.