Need help in getting the column highlighted based on month

Working Days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
A 23 20 20 22 20 22 23 20 19 20 20 22
B 22 19 21 22 18 22 22 20 17 20 20 22
C 19 18 15 22 19 21 18 15 21 20 20 22
D 19 19 22 22 21 22 22 14 22 20 20 22
E 21 20 22 22 21 19 19 20 20 20 20 22
F 5 4 7 0 20 4 8 11 2 20 20 22
G 23 19 21 22 20 21 17 20 16 20 20 22
H 23 19 20 22 20 21 22 19 21 20 20 22
I 23 19 21 22 21 22 15 19 20 20 20 22


I have the above table and I want to highlight the column based on current month. The month is mentioned as heading of the table, as soon as I open the sheet it has to highlight the entire column(A to I). Any and all help welcome and thank ful.