"Saving daylight!" Sign and mail one of these post cards to your congressman at Washington and help make it a national law to set the clock one hour aBuy wall art of this image titled: "Saving daylight!" Sign and mail one of these post cards to your congressman at Washington and help make it a national law to set the clock one hour ahead., from the World War I Posters Collection by Second Story Prints. Top quality print reproductions available now! Tags United States Capitol (Washington, D. C.) 1910 1920. World War, 1914 1918 Communications United States. Correspondence United States 1910 1920.