"[25] On April 17, 1952, President Harry S. Truman signed a bill proclaiming a National Day of Prayer must be declared by each subsequent president at an appropriate date of his choice. Days that are not fixed to the Gregorian calendar are sorted by their occurrences. [31][32], Republican President Donald Trump and First Lady Melania Trump attended church services in observation of a special National Day of Prayer, which Trump previously declared, in support of the victims of Hurricane Harvey dwelling in the state of Texas, to "uplift one another and assist those suffering from the consequences of this terrible storm. Constitution 101 Curriculum. The president is required by law (36 U.S.C. [11] A proclamation to this end was sent to every town in the colonies.