I am looking for a formula or a way to have years & months calculated from a
starting month and year. Here is what I have.

Sheet 1 has 2 cells, cell A1 is for picking the starting month (from a drop
down list) & cell A2 is to pick the starting year (also from a drop down
list).

Sheet 2 is set up with a 36 month grid in which estimated hours are input.
What I need it to do is automatically calculate the year (in cell row 1) and
the month (in cell row 2) based on the selections made on sheet 1. Also, I
need it to automatically roll to the next higher year when ever the month
"Jan" comes up (see D1,2). I would like it to display year & month as shown
here.

(A) (B) (C) (D)
(1) 2005 2005 2005 2006 and so for a total of 36 months
(2) Oct Nov Dec Jan