This document lists the months of the year in a 3x3 grid format. It appears to be tracking birthdays by month with September through November listed in the first row, December through February in the second row, and March through May in the third row with the final three months of June, July and August.

1. http://duendesjuguetones.blogspot.com
BIRTHDAYS
SEPTEMBER OCTOBER NOVEMBER
DECEMBER JANUARY FEBRUARY
MARCH APRIL MAY
JUNE JULY AUGUST