The 1956 law was the first establishment of an official motto for the country, although
When did In God We Trust become our motto?
Federal government
On July 30, 1956, the 84th Congress passed a joint resolution "declaring 'IN GOD WE TRUST' the national motto of the United States." The resolution passed both the House and the Senate unanimously and without debate.
When did In God We Trust first appear?
April 22, 1864: Congress Adds 'In God We Trust' to Its Currency. In 1864, Congress passed the Coinage Act so that adaptations could be made to U.S. currency, and on April 22, "IN GOD WE TRUST" was first printed on the two-cent coin.