Hi!

Enter this formula in C1 using the key combo of CTRL,SHIFT,ENTER:

=IF(B1="X","",IF(A1=MIN(IF(B$1:B$13<"X",IF(MONTH( A$1:A$13)=MONTH(A1),IF(YEAR(A$1:A$13)=YEAR(A1),A$1 :A$13)))),"First
day",IF(A1=MAX(IF(B$1:B$13<"X",IF(MONTH(A$1:A$13) =MONTH(A1),IF(YEAR(A$1:A$13)=YEAR(A1),A$1:A$13)))) ,"Last
day","")))

That's a real beast! Maybe someone can come up with a cleaner solution. I
don't have the time.

Biff

"Zbigniew Lewandowski" wrote in message
...
Hi,

I have sheet:
In A column exist date
In B column exist "x" or null
In C column please bulid formula: first or last day in month only for day
if in column B exist null.

Example:

A B Formula in C kolumn
5/1/05 x
5/2/05 x
5/3/05 first day of month
...
5/28/05 last day of month
5/29/05 x
5/30/05 x
5/31/05 x
6/1/05 first day of month
6/2/05 x
....
6/29/05 last day of month
6/30/05 x
7/1/05 first day of month

Thanks
Zbych