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A small number of states, including Illinois, observe Lincoln’s birthday as a public holiday, according to the Library of Congress.

For Abraham Lincoln's birthday on Feb. 12, we once again take a look at the president whose life – and death – changed America.

Moved by the testimony of tribal leaders and other experts, Boldt pointedly waited until Lincoln’s birthday to hand down a decision recognizing the tribes’ right to half of the state’s fish.

Boldt’s decision, issued Feb. 12, 1974 — Abraham Lincoln’s birthday — affirmed the treaties signed in the 1850s, protecting fishing rights for Native Americans.

Indiana and New Mexico celebrate Lincoln’s birthday on the day after Thanksgiving.