This tool helps determine a player’s age group based on their date of birth. After entering the player’s birthdate, the tool will display the relative age group options for three roster formation cycles: January 1–December 31, August 1–July 31, and September 1–August 31. The results are intended as a guide; please consult your club, league, or organization member to confirm the most appropriate age group for the player.
Calculator at US Soccer: https://www.ussoccer.com/ecosystem-review/player-registration/age-group-calculator