Date/deɪt/ Definition 1 of 6Pro Tip 1/2American Format Americans write dates as month/day/year, different from many other countries. July 4, 2021 is written as 07/04/2021 in the U.S. Pro Tip 2/2Historical Context Use 'date' to refer to important days in history, not just the present. The date of the moon landing was July 20, 1969.