More date validation

MAR 2017

You can now check dates of birth 'as at' a particular date - for example the start of the season.

This is useful if you have something like a GoTri event where you need to be strict about which age groups can enter which categories.

For example, this validation on your 'date of birth' question ensures entrants be between 9 and 10 years old on 31st December, in the year of the event:

More about the other date validation options here