Immigrant's Day is observed annually in Argentina on September 4. This holiday, while not a public holiday, is widely celebrated across the country, highlighting the significant role of immigration in shaping Argentina's cultural identity. The celebration began in 1949 with the establishment of the National Migrations Office. A key event of the holiday is the national festival of immigrants, which takes place in the city of Oberá, known for its diverse immigrant population from countries such as Sweden, France, Norway, Finland, Russia, Germany, England, Lebanon, and Denmark. On this day, attendees can learn about the cultural traditions of various nations, reflecting the rich tapestry of Argentina's immigrant heritage. Today, approximately 2 million people, or 4.5% of the population, were born outside of Argentina, underscoring the ongoing importance of immigration in the nation.