What are the age groups?

Below is the date of birth parameters for each age group

Under 9's - 01/01/2015 - 30/04/2017
Under 10's - 0101/2014 - 31/12/2014
Under 11's - 0101/2013 - 31/12/2013
Under 12's - 01/01/2012 - 31/12/2012
Under 13's - 01/01/2011 - 31/12/2011
Under 14's - 01/01/2010 - 31/12/2010
Under 15's - 01/01/2009 - 31/12/2009
Under 16's - 01/01/2008 - 31/12/2008