How is my child's age group decided for a meet?

Under USA Swimming rules (Article 205.2):

• Age is based on your child's date of birth (not time of birth).
• Their age on the first day of the meet is their age for the whole meet, even if they have a birthday partway through.
• They swim in the age group events for that age, unless the meet combines age groups.

If a meet is postponed:

• Before it starts: if it's moved 14 days or less, age is still set by the original first day. If it's moved more than 14 days, age is set by the new first day.
• After it has started: if it resumes within 14 days, ages don't change.

Note: these rules apply to USA Swimming sanctioned and approved meets. Summer and recreation leagues that aren't run under USA Swimming may use their own age cut-off date.