WHEN REMEMBERING THE NUMBER OF DAYS IN THE MONTH, MAKE A FIST;
EACH KNUCKLE REPRESENTS A MONTH THAT HAS THIRTY-ONE DAYS AND
EACH SPACE BETWEEN THE KNUCKLE REPRESENTS A MONTH THAT HAS
THIRTY DAYS AND TWENTY-EIGHT DAYS (FOR FEBRUARY).

Where learned: OHIO ; BRYAN

Date learned: 10-21-1973