American Citizenship Day is observed on March 2 each year in Puerto Rico as a public holiday to commemorate the granting of U.S. citizenship to Puerto Ricans through the Jones-Shafroth Act. This act, signed by President Woodrow Wilson, established statutory U.S. citizenship for Puerto Ricans born on or after April 25, 1898. The holiday is marked by the closure of offices and public observance across the island. The significance of this day lies in its historical context, as it reflects the transition of Puerto Rico from Spanish rule to American governance following the Spanish-American War. American Citizenship Day serves as a reminder of the unique status and rights of Puerto Ricans as U.S. citizens.