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### calculate back dates

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```Hi

is there a way to figure out a date 9 months previous to a date?

eg. I have an install date of 12/02/10, is there a way or a formula that can
count back 9 months from that install date? (they need to be weekdays)

thanks very much
```
 0

```Just use the Date function, as in:
=Date(year(a1),month(a1)-9,day(a1))

Regards,
Fred

"sonia" <sonia@discussions.microsoft.com> wrote in message
news:63DDCF12-C093-4532-B71C-2FB9112A47B8@microsoft.com...
> Hi
>
> is there a way to figure out a date 9 months previous to a date?
>
> eg. I have an install date of 12/02/10, is there a way or a formula that
> can
> count back 9 months from that install date? (they need to be weekdays)
>
> thanks very much

```
 0

```ty this one

=IF(MONTH(A1)>=9,DATE(YEAR(A1),MONTH(A1)-9,DAY(A1)),DATE(YEAR(A1),MONTH(A1)-9,DAY(A1)))

elMedex

"sonia" wrote:

> Hi
>
> is there a way to figure out a date 9 months previous to a date?
>
> eg. I have an install date of 12/02/10, is there a way or a formula that can
> count back 9 months from that install date? (they need to be weekdays)
>
> thanks very much
```
 0

```sorry this is the one is easier

=DATE(YEAR(A1),MONTH(A1)-9,DAY(A1))

the other was a test but is redundant

"Alejandro Medinilla "elMedex"" wrote:

> ty this one
>
> =IF(MONTH(A1)>=9,DATE(YEAR(A1),MONTH(A1)-9,DAY(A1)),DATE(YEAR(A1),MONTH(A1)-9,DAY(A1)))
>
>
>
> elMedex
>
> "sonia" wrote:
>
> > Hi
> >
> > is there a way to figure out a date 9 months previous to a date?
> >
> > eg. I have an install date of 12/02/10, is there a way or a formula that can
> > count back 9 months from that install date? (they need to be weekdays)
> >
> > thanks very much
```
 0

```Hi

I'm getting a #VALUE! error, everytime I try it.
I put the formulas in the way explained, but I changed A1 to the cell that i
have the install date in, (as i would change the cell to all the different
install dates, there isn;'t just one install date, there are many.

ANy ideas on this problem??

"sonia" wrote:

> Hi
>
> is there a way to figure out a date 9 months previous to a date?
>
> eg. I have an install date of 12/02/10, is there a way or a formula that can
> count back 9 months from that install date? (they need to be weekdays)
>
> thanks very much
```
 0

```Your most likely problem is your cell doesn't have a date in it, it has
text. You need to convert the text to a date.

To confirm this, simply enter 12/02/10 in your cell. See if that solves your
problem. If it does, then you will need to convert your other cells to
dates.

Regards,
Fred

"sonia" <sonia@discussions.microsoft.com> wrote in message
news:94082B8F-D7B4-43CC-A096-5952BB208B19@microsoft.com...
> Hi
>
> I'm getting a #VALUE! error, everytime I try it.
> I put the formulas in the way explained, but I changed A1 to the cell that
> i
> have the install date in, (as i would change the cell to all the different
> install dates, there isn;'t just one install date, there are many.
>
> ANy ideas on this problem??
>
> "sonia" wrote:
>
>> Hi
>>
>> is there a way to figure out a date 9 months previous to a date?
>>
>> eg. I have an install date of 12/02/10, is there a way or a formula that
>> can
>> count back 9 months from that install date? (they need to be weekdays)
>>
>> thanks very much

```
 0

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7/28/2012 8:44:31 PM