Queen Juliana of the Netherlands was born on April 30, 1909, and became queen in 1948 after the abdication of her mother, Queen Wilhelmina. She ruled until her own abdication in 1980, making her one of the longest-serving monarchs in Dutch history. Juliana was known for her warm personality and dedication to social issues, including education and health care. During her reign, Queen Juliana oversaw significant changes in the Netherlands, including the decolonization of Indonesia and the establishment of a welfare state. She was married to Prince Bernhard and had four daughters, contributing to the royal family's prominence in Dutch society.