Can't resist another go, as it is still not right

=IF(ROW(INDIRECT(MONTH($A$1)&":"&MONTH($A$1)+11))= MONTH($A$1),DATE(YEAR(A$1)
,MONTH(A$1)+1,1)-A1,IF(ROW(INDIRECT(MONTH($A$1)&":"&MONTH($A$1)+11) )=MONTH($
B$1)+(YEAR($B$1)-YEAR($A$1))*12,DAY($B$1),DAY(DATE(YEAR(A$1),MONTH( A$1)+ROW(
INDIRECT("1:12")),0))*(MONTH($B$1)+(YEAR($B$1)-YEAR($A$1))*12=ROW(INDIRECT(
MONTH($A$1)&":"&MONTH($A$1)+11)))))

This works in all cases I can see except where the campaign starts and ends
in the same month. Getting a bit messy though.

--

HTH

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


"Bob Phillips" wrote in message
...
Actually, this can be clarified as you are only running for up to one year
:-), and there is a problem with the formula. It works okay if the
campaign
starts in Jan, but any other month fails.

Amendment #3.


=IF(ROW(INDIRECT(MONTH($A$1)&":"&MONTH($A$1)+11))= MONTH($A$1),DATE(YEAR(A$1)

,MONTH(A$1)+1,1)-A1,IF(ROW(INDIRECT("1:12"))=MONTH($B$1),DAY($B$1), DAY(DATE(

YEAR(A$1),MONTH(A$1)+ROW(INDIRECT("1:12")),0))*(MO NTH($B$1)=ROW(INDIRECT("1
:12")))))

and still an array formula

--

HTH

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


"Bob Phillips" wrote in message
...
You can actually do it all inj one formula,

Select C1:C12, and enter this formula, again as an array formula



=IF(ROW(INDIRECT("1:100"))=MONTH($A$1),DATE(YEAR(A $1),MONTH(A$1)+1,1)-A1,IF(


ROW(INDIRECT("1:100"))=MONTH($B$1),DAY($B$1),DAY(D ATE(YEAR(A$1),MONTH(A$1)+R
OW(INDIRECT("1:100")),0))*(MONTH($B$1)=ROW(INDIRE CT("1:100")))))

--

HTH

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


"Bob Phillips" wrote in message
...
Okay, another shot.

Assuming that the start date is in A1, end date is in B1, and the
campaign
days are in C1:C12

In C1: =DATE(YEAR(A$1),MONTH(A$1)+1,1)-A1
Select all C2:C11 cells together, then enter this array formula into
the
formula bar (commit with Ctrlo-Shift-Enter)



=IF(ROW(INDIRECT("2:100"))=MONTH($B$1),DAY($B$1),D AY(DATE(YEAR(A$1),MONTH(A$
1)+ROW(INDIRECT("2:100")),0))*(MONTH($B$1)=ROW(IN DIRECT("2:100"))))

--

HTH

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


"STFC" wrote in message
...
Sorry I haven't been that clear have I.

Yes a more variable formula - the campaigns can run for anything
from
a
week
to a year.

"Bob Phillips" wrote:

Are you looking for a more variable formula, or will the start and
end
dates
always span 4 months?

--

HTH

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


"STFC" wrote in message
...
Hi Bob

Wow, thanks for the quick response.

I was really after a formaula that would take into account
partial
months.

Therefore if Start Date = 15 Jan, End Date= 4th Apr

Jan=17 days, Feb=28days Mar= 31day and Apr=4 days, May=0, Jun=0
etc.
This
is
for when campaigns ran in a year, and which months it ran in.

Andy.



"Bob Phillips" wrote:

C1: =DAY(DATE(YEAR(A1),MONTH(A1)+1,0))
D1: =DAY(DATE(YEAR(A1),MONTH(A1)+2,0))
E1: =DAY(DATE(YEAR(A1),MONTH(A1)+3,0))
--

HTH

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


"STFC" wrote in message
...
Hello,

Hope someone can help.

A1 = Start date B1=End Date eg A1 = 1st Jan B1=4th April

C1=Days in Jan D1=Days in Feb E1=Days in Mar etc until Dec.

Therefore for the above example C1 would = 31days D1 =
28days
E1
=
31days
and F1 = 4 days.

I have been playing around with IF and DATEDIF but I'm
getting
nowhere.
Any
help would be much appreciated.