The Birth Year Chart above provides an example on how to calculate age group and birth year.
For the purposes of calculation, it is the second year of a split-year competitive season which determines what number should be used to calculate age group.
For example: 2017-2018
Take 2018 minus birth year = Age Group
2018 - 2011 = U7
or if you know the age group and need the birth year
2018 - U7 = 2011