You could set one range, drag to apply it to all the fields you want. Like:
| A | B | C | D | E | F |
---|
Product | Month | Date 1 | Date 2 | Date 3 | Date 4 | |
A | January | BLANK | | | | |
B | January | BLANK | BLANK | | | |
C | January | BLANK | | | | |
D | January | BLANK | | | | |
E | January | BLANK | | | | |
F | January | BLANK | BLANK | | | |
G | January | BLANK | | | | |
H | January | BLANK | | | | |
I | January | BLANK | BLANK | BLANK | | |
A | February | BLANK | | | | |
B | February | BLANK | | | | |
C | February | | | | | |
D | February | BLANK | | | | |
E | February | | | | | |
F | February | BLANK | | | | |
G | February | BLANK | BLANK | | | |
H | February | BLANK | | | | |
I | February | BLANK | BLANK | BLANK | | |
<tbody>
[TD="align: center"]1[/TD]
[TD="align: center"]2[/TD]
[TD="align: right"]2/2/2014[/TD]
[TD="align: right"]3/2/2013[/TD]
[TD="align: right"]4/2/2012[/TD]
[TD="align: center"]3[/TD]
[TD="align: right"]2/2/2012[/TD]
[TD="align: right"]3/2/2012[/TD]
[TD="align: center"]4[/TD]
[TD="align: right"]2/2/2013[/TD]
[TD="align: right"]3/2/2014[/TD]
[TD="align: right"]4/2/2013[/TD]
[TD="align: center"]5[/TD]
[TD="align: right"]2/2/2012[/TD]
[TD="align: right"]3/2/2014[/TD]
[TD="align: right"]4/2/2014[/TD]
[TD="align: center"]6[/TD]
[TD="align: right"]2/2/2014[/TD]
[TD="align: right"]3/2/2013[/TD]
[TD="align: right"]4/2/2012[/TD]
[TD="align: center"]7[/TD]
[TD="align: right"]2/2/2012[/TD]
[TD="align: right"]3/2/2012[/TD]
[TD="align: center"]8[/TD]
[TD="align: right"]2/2/2013[/TD]
[TD="align: right"]3/2/2014[/TD]
[TD="align: right"]4/2/2013[/TD]
[TD="align: center"]9[/TD]
[TD="align: right"]2/2/2012[/TD]
[TD="align: right"]3/2/2014[/TD]
[TD="align: right"]4/2/2014[/TD]
[TD="align: center"]10[/TD]
[TD="align: right"]4/2/2012[/TD]
[TD="align: center"]11[/TD]
[TD="align: right"]2/2/2012[/TD]
[TD="align: right"]2/2/2012[/TD]
[TD="align: right"]4/2/2013[/TD]
[TD="align: center"]12[/TD]
[TD="align: right"]3/2/2013[/TD]
[TD="align: right"]4/2/2014[/TD]
[TD="align: right"]4/2/2013[/TD]
[TD="align: center"]13[/TD]
[TD="align: right"]3/2/2014[/TD]
[TD="align: right"]3/2/2012[/TD]
[TD="align: right"]2/2/2012[/TD]
[TD="align: right"]4/2/2014[/TD]
[TD="align: center"]14[/TD]
[TD="align: right"]3/2/2013[/TD]
[TD="align: right"]3/2/2014[/TD]
[TD="align: right"]3/2/2013[/TD]
[TD="align: center"]15[/TD]
[TD="align: right"]3/2/2012[/TD]
[TD="align: right"]7/9/2014[/TD]
[TD="align: right"]2/2/2012[/TD]
[TD="align: right"]3/2/2012[/TD]
[TD="align: center"]16[/TD]
[TD="align: right"]3/2/2014[/TD]
[TD="align: right"]3/2/2013[/TD]
[TD="align: right"]3/2/2014[/TD]
[TD="align: center"]17[/TD]
[TD="align: right"]3/2/2012[/TD]
[TD="align: right"]3/2/2014[/TD]
[TD="align: center"]18[/TD]
[TD="align: right"]4/2/2012[/TD]
[TD="align: right"]3/2/2014[/TD]
[TD="align: right"]3/2/2014[/TD]
[TD="align: center"]19[/TD]
[TD="align: right"]4/2/2013[/TD]
</tbody>
It checks the array to make sure the month matches and that the text, "Blank" appears in the array. Drag to apply to all the ranges you want.