Cells D1:AJ1 have years 2006:2038. Cells C2:C13 have Jan thru Dec. Cell A4
has the array formula

=LOOKUP(9.999999999999E+307,INDEX(D2:AH13,0,MAX(IF (D2:AH13<"",COLUMN(D2:AH13)-COLUMN(D2)+1))))

,showing the last figure entered in the table. Note: I had to push
Ctrl+Shift+Enter to execute the formula. How do I enter into cell BC16 the
Month corresponding to the last figure entered in D2:AH13 from column C?