Lincoln's Birthday is a legal holiday in the U.S. state of Illinois and some other states. It is observed on the anniversary of Abraham Lincoln's birth on February 12, 1809. If the day falls on Saturday or Sunday, it is transferred to the nearest weekday.

Many states that had formerly observed this holiday have created a joint holiday to honor both Lincoln and George Washington, sometimes calling it "Presidents' Day". It coincides with the Federal holiday officially designated "Washington's Birthday", observed on the third Monday of February. There has never been an annual Federal holiday honoring Lincoln.