United States federal observances are days, weeks, months, or other periods designated by the United States Congress for the commemoration or other observance of various events, activities, or topics.

Federal observances that are designated by Congress appear in Title 36 of the United States Code (36 U.S.C.

Note that not all of the laws below require that the observance be declared, in some cases, such as 36 U.S.C.

§ 114, Congress simply requested the president to issue a proclamation of the observance.

The president may also declare selected federal observances by presidential proclamation.