You may be in "Edit mode" with your cell selection..........click off your
selected cell(s) and then try highlighting them again.........

Vaya con Dios,
Chuck, CABGx3


"dgams" wrote in message
...
I am working on a spreadsheet in excel 2003. I have a column of dates and
I
want to format each month to have a different color. Under format,
conditional formatting is in gray and won't allow me to select it. Does
anyone know what I'm doing wrong?