36 U.S.C. § 141 : US Code - Section 141: Thomas Jefferson's birthday

Search 36 U.S.C. § 141 : US Code - Section 141: Thomas Jefferson's birthday

The President shall issue each year a proclamation -
(1) calling on officials of the United States Government to
display the flag of the United States on all Government buildings
on April 13; and
(2) inviting the people of the United States to observe April
13 in schools and churches, or other suitable places, with
appropriate ceremonies in commemoration of Thomas Jefferson's
birthday.