#### Formula for calculating # of days between dates minus a particular date if present

```I'm trying to create a formula that will calculate the number of days
between two dates automatically subtracting a day(s) from the equation
if a specified date(s) falls in between the two dates.

For example, I don't want 1/15/04 to register as a counted day.  If I
enter the dates 1/1/04 in one cell and 1/12/04 in another cell then
it's a straight foward DATEDIF equation. But if I enter 1/1/04 and
1/28/04, then I want the formula to figure out the number of days
between 1/1 and 1/28 automatically subtracting 1/15 from the equation.
This gets trickier as I need some calucations that will be subtracting
multiple, non-contiguous days. (i.e. calculate the number of days
between 1/1/04 and 1/31/04 but not counting 1/5/04, 1/15/04, or
1/18/04).

I'm sure there's a way to do this using excel's date format, but I sure
can't figure it out.  Can anyone help me on this.

Thanks!

---
Message posted from http://www.ExcelForum.com/

```
 0
1/21/2004 11:07:20 PM
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```My suggestion would be to simply subtract the dates and
subtract the count of dates to exclude:

=Date1-Date2-COUNT(C1:C5)

where the C1:C5 contains 1 to 5 dates needed to exclude

HTH
Jason
Atlanta, GA

>-----Original Message-----
>I'm trying to create a formula that will calculate the
number of days
>between two dates automatically subtracting a day(s) from
the equation
>if a specified date(s) falls in between the two dates.
>
>For example, I don't want 1/15/04 to register as a
counted day.  If I
>enter the dates 1/1/04 in one cell and 1/12/04 in another
cell then
>it's a straight foward DATEDIF equation. But if I enter
1/1/04 and
>1/28/04, then I want the formula to figure out the number
of days
>between 1/1 and 1/28 automatically subtracting 1/15 from
the equation.
>This gets trickier as I need some calucations that will
be subtracting
>multiple, non-contiguous days. (i.e. calculate the number
of days
>between 1/1/04 and 1/31/04 but not counting 1/5/04,
1/15/04, or
>1/18/04).
>
>I'm sure there's a way to do this using excel's date
format, but I sure
>can't figure it out.  Can anyone help me on this.
>
>Thanks!
>
>
>---
>Message posted from http://www.ExcelForum.com/
>
>.
>
```
 0
jason.morin (561)
1/21/2004 11:45:16 PM
```On Wed, 21 Jan 2004 17:07:20 -0600, Jarod
<<Jarod.10emm6@excelforum-nospam.com>> wrote:

>I'm trying to create a formula that will calculate the number of days
>between two dates automatically subtracting a day(s) from the equation
>if a specified date(s) falls in between the two dates.
>
>For example, I don't want 1/15/04 to register as a counted day.  If I
>enter the dates 1/1/04 in one cell and 1/12/04 in another cell then
>it's a straight foward DATEDIF equation. But if I enter 1/1/04 and
>1/28/04, then I want the formula to figure out the number of days
>between 1/1 and 1/28 automatically subtracting 1/15 from the equation.
>This gets trickier as I need some calucations that will be subtracting
>multiple, non-contiguous days. (i.e. calculate the number of days
>between 1/1/04 and 1/31/04 but not counting 1/5/04, 1/15/04, or
>1/18/04).
>
>I'm sure there's a way to do this using excel's date format, but I sure
>can't figure it out.  Can anyone help me on this.
>
>Thanks!
>
>
>---
>Message posted from http://www.ExcelForum.com/

The array formula:

=EndDate-StartDate-SUM((ExcludeDates>=StartDate)*(ExcludeDates<=EndDate))

To enter an array formula, hold down <ctrl><shift> while hitting <enter>.
Excel will place braces {...} around the formula.

Put the "ExcludeDates" in a named range someplace.

--ron
```
 0
1/22/2004 8:11:30 PM

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