Bank Indonesia Day, observed in Indonesia every July 5, commemorates the establishment of Bank Negara Indonesia, which functioned as the central bank from 1946 to 1949. The history of banking in Indonesia dates back to the mid-18th century, with the founding of the first bank, Bank van Courant, in 1746. Following a series of developments, including the establishment of the Bank of Java in 1828, the Indonesian banking system underwent significant changes during World War II, leading to the creation of Bank Negara Indonesia shortly after Indonesia's proclamation of independence in 1945. This day celebrates the role of Bank Indonesia, which was officially recognized as the central bank in 1968 and is responsible for maintaining the stability of the national currency and financial system. The observance reflects the importance of banking history and economic sovereignty in Indonesia.