Assertion: annual celebration | /r/CapableOf | commemorate its creator
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text: The annual celebrations on Flag Day and also Defenders Day (September 12, since 1814) commemorate the Star-Spangled Banner and its creator Mary Pickersgill, for the huge emblem that flew over Fort McHenry guarding Baltimore harbor during the British Royal Navy's three days attack in the Battle of Baltimore during the War of 1812 (1812–1815).[citation needed]