the first day of January (New Year's Day);
the third Monday in January (observance of Martin Luther King, Jr.'s birthday);
the twelfth day in February (Abraham Lincoln's birthday);
the third Monday in February (Presidents Day);
the first Monday in March (observance of Casimir Pulaski's birthday);
the Friday preceding Easter Sunday (Good Friday);
the last Monday of May (Memorial Day);
the nineteenth day of June (Juneteenth National Freedom Day);
the fourth day of July (Independence Day);
the first Monday in September (Labor Day);
the second Monday in October (Columbus Day);
the eleventh day of November (Veterans' Day);
the fourth Thursday in November (Thanksgiving Day);
the twenty-fifth day in December (Christmas Day);
the days upon which the general elections for members of the House of Representatives are held, and any day proclaimed by the Governor of this State as a legal holiday. From 12 o'clock noon to 12 o'clock midnight of each Saturday shall be considered a half holiday. In addition to such holidays and half-holidays, a bank may select one day of the week to remain closed, as provided in subsection (b) of this Section.
205 ILCS 630/17