National Dollar Day is unofficially observed in the United States on August 8. This day commemorates the establishment of the U.S. monetary system in 1786, specifically marking the approval of the division of coins by the Continental Congress. The U.S. dollar (USD) serves as the official currency of the United States and is widely used in international transactions. Customs associated with National Dollar Day include learning about the U.S. dollar, taking a pledge to save a dollar a day for a year, starting a dollar coin collection, and sharing the holiday on social media using hashtags like #NationalDollarDay. The holiday celebrates the significance of the dollar, which was officially created by the Coinage Act of 1792, with the first one-dollar bill issued in 1862.