=if(B2="",date(year(a2),month(a2),1))

is first day, but what determines whether to calculate first or last?

--

HTH

RP
(remove nothere from the email address if mailing direct)


"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