Previous Month Jan Feb Mar Apr
{Jan:14,May:5,Aug:7} Empty {Jan:14,Apr:3,Aug:17} Empty Empty
{Jan:14,May:5,Aug:7} Empty Empty {Jan:14,May:5,Aug:8} Empty
{Jan:14,May:5,Aug:7} Empty {Jan:14,May:5,Aug:7} Empty Empty
{Jan:12,May:5,Aug:7} Empty Empty Empty Empty
{Jan:14,May:5,Aug:7} Empty Empty Empty Empty
{Jan:14,May:5,Aug:7) {Jan:14,Mar:5,Aug:7} Empty {Jan:14,Mar:5,Aug:7} Empty
{Jan:14,Mar:5,Apr:7} Empty {Jan:14,Mar:5,Jun:7} Empty Empty