Excel conditional formatting based on if it is in this currently displayed month.
I am creating a work calendar and I want it to Grey out the Days of the week that are NOT part of the currently displayed month.  I have the First Day of the Month Displayed in Cell A1

How can I make the Cell Monday in Cell B3 and the Cell in B4 to have a grey background?

I know this is simple but I cannot figure it out. 

Thanks
Excel conditional formatting based on if it is in this currently displayed month.
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I am creating a work calendar and I want it to Grey out the Days of the week that are NOT part of the currently displayed month.  I have the First Day of the Month Displayed in Cell A1

How can I make the Cell Monday in Cell B3 and the Cell in B4 to have a grey background?

I know this is simple but I cannot figure it out. 

Thanks