The President also has the right to call the Congress into special session, a power that has been used several times in American history. If Congress cannot agree on a recess date, Article II, Section 3 states that the President "may adjourn them to such time as he shall think proper." No President has ever had to set a date for a Congressional recess, however.
The President has rarely called a special session of Congress. One of the most famous uses of the Special Session was the special session that President Roosevelt called into session when he became President. That special session passed all of the 100 day legislation that FDR had proposed.