| Defenders Day | |
|---|---|
| Observed by | Maryland |
| Type | Local, Historical |
| Significance | Anniversary of the successful defense of the city of Baltimore from an invading British military force during the War of 1812. |
| Date | September 12 |
| Next time | September 12, 2025 |
| Frequency | annual |
Defenders Day is a longtime legal holiday on September 12, in the U.S. state of Maryland, in the City of Baltimore and surrounding Baltimore County.[1] It commemorates the successful defense of the city of Baltimore on September 12-13-14, 1814 from an invading British force during the War of 1812, an event which led to the writing of the words of a poem, which when set to music a few days later, became known as "The Star-Spangled Banner", which in 1931 was designated as the national anthem of the United States.