Little League uses specific age determination dates to ensure kids play in divisions that match their age and grade level. For baseball and the Challenger Division, a child's league age is their age as of August 31 of the current year, aligning with many school enrollment cutoffs. This setup helps kids play alongside their classmates.
For example, for the 2025 Little League baseball season, a child born September 2, 2019 would be Little League Age 5. But a child born just three days earlier, on August 30, 2019, would be Little League Age 6.
In softball, the age determination date remains January 1.
To find your child's league age, Little League provides official age charts and a League-Age Calculator . These tools make it easy to identify the appropriate division for your child, ensuring they have a fun and suitable experience. It's a good idea to double-check your child's league age using these resources before registering.