US Soccer mandates new Age Matrix to align USA with the rest of the world.
NYSW will implement the new age matrix starting in the 2016-2017 seasonal year.

Calendar Year

Effective August 2017, the grouping of players will change nationwide, with encouraged adoption of best practices in August of 2016. U.S. Soccer has mandated that all United States youth soccer programs go back to calendar birth years to align with international standards and Youth National Team programs.

US Youth Soccer will implement the best practice of calendar year age grouping for player registration beginning with the 2016-2017 soccer year for US Youth Soccer programs and competitions.

Using the school calendar for age groups is practiced only in the United States and Canada; as all other FIFA members go by the calendar year. 

Previously, age groups were determined based on players born between Aug. 1 and July 31. The change to calendar year age groups will reflect the calendar year, or Jan. 1 to Dec. 31. Players are still allowed to “play up” or play in an older age group.

2015-2016 Age Matrix
Effective 1 September 2015 through 31 August 2016
Division Aug Sept Oct Nov Dec Jan Feb Mar Apr May Jun Jul
U19 96 96 96 96 96 97 97 97 97 97 97 97
U18 97 97 97 97 97 98 98 98 98 98 98 98
U17 98 98 98 98 98 99 99 99 99 99 99 99
U16 99 99 99 99 99 00 00 00 00 00 00 00
U15 00 00 00 00 00 01 01 01 01 01 01 01
U14 01 01 01 01 01 02 02 02 02 02 02 02
U13 02 02 02 02 02 03 03 03 03 03 03 03
U12 03 03 03 03 03 04 04 04 04 04 04 04
U11 04 04 04 04 04 05 05 05 05 05 05 05
U10 05 05 05 05 05 06 06 06 06 06 06 06
U09 06 06 06 06 06 07 07 07 07 07 07 07
U08 07 07 07 07 07 08 08 08 08 08 08 08
U07 08 08 08 08 08 09 09 09 09 09 09 09
U06 09 09 09 09 09 10 10 10 10 10 10 10
U05 10 10 10 10 10 11 11 11 11 11 11 11
U04 11 11 11 11 11 12 12 12 12 12 12 12