Yes, I think this kind of formula is much easier to maintain. If you don't
like the "clutter", you can format C1:N1 as "mmm-yy" and hide row 2 (or
vice-versa).

On Wed, 26 Jan 2005 09:05:05 -0800, Andy W
wrote:

This solution works as well - I like the simplicity, didn't even think about
approaching it this way. Thanks.

"Myrna Larson" wrote:

Here's another approach that will simplify the formulas. In C1:N1 put the
dates of the first of the months, i.e. Jan 1, 2005 through Dec 1, 2005. In
C2:N2, put the last day of each month, i.e. Jan 31, 2005, Feb 28, 2005, ...
Dec 31, 2005. (do that with a formula or literals).

Then, with the start date in A3 and the end date in B3, put this formula in
C3

=MAX(MIN($B3,C$2)-MAX($A3,C$1),-1)+1

and copy it across through N3 and down for as many rows as you need.



On Wed, 26 Jan 2005 07:31:06 -0800, "STFC"
wrote:

Hi Bob,

the names Andy - I'll change my display name.

This is sooo close now. It works except for campaigns starting and
finishing
in the same month. And eg 24th Feb to 10 Mar would return 4 days in Feb
and
not 5.

This is making a lot more sense now though - thanks.

Andy

"Bob Phillips" wrote:

Hi STFC (sorry, don't know your name)

As long as the start date and end date are in the same year, and start
month
will be less than end month, we can simplify the formula and get it the
way
you want



=IF(AND(COLUMN(A1)MONTH($A$1),COLUMN(A1)<MONTH($B $1)),DAY(DATE(YEAR($A$1),C


OLUMN(A1)+1,0)),IF(COLUMN(A1)=MONTH($A$1),DAY(DATE (YEAR($A$1),COLUMN(A1)+1,0
))-DAY($A$1),IF(COLUMN(A1)=MONTH($B$1),DAY($B$1),0)))

This is NOT an array formula, so just commit with Enter.

--

HTH

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


"STFC" wrote in message
...
Hi Bob,

First time using this site, will definitely use it again. I'm quite
glad
I
was right in thinking this wasn't easy to solve.

The formula is v v impressive. The only problem is trying to get a
campaign
that starts in Mar to return 0 for Jan and Feb. Would it be easier to
have
12
separate formulas for C1:N1 to induvidually workout if they had days
running
in that month?

Thanks again for all your help, much appreciated.

"Bob Phillips" wrote:

I have done it so that C1 contains the month the campaign starts in,
so
Jan
is in C12 (that is next year).

I spotted the same month problem in my last post, but it can be
fixed,
as
long as the campaign doesn't go over a year). To use C1:N1, use this
formula




=IF((MONTH($A$1)=MONTH($B$1))*(MONTH($A$1)=COLUMN( INDIRECT(MONTH($A$1)&":"&M



ONTH($A$1)+11))),$B$1-$A$1,IF(COLUMN(INDIRECT(MONTH($A$1)&":"&MONTH($A$1 )+11


))=MONTH($A$1),DATE(YEAR(A$1),MONTH(A$1)+1,1)-A1,IF(COLUMN(INDIRECT(MONTH(
$A



$1)&":"&MONTH($A$1)+11))=MONTH($B$1)+(YEAR($B$1)-YEAR($A$1))*12,DAY($B$1),DA



Y(DATE(YEAR(A$1),MONTH($A$1)+COLUMN(INDIRECT("1:12 ")),0))*(MONTH($B$1)+(YEAR


($B$1)-YEAR($A$1))*12=COLUMN(INDIRECT(MONTH($A$1)&":"&MO NTH($A$1)+11))))))


--

HTH

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


"STFC" wrote in message
...
Hi Bob,

This is v impressive. I have some learning to do.

This is close to working, but if the start date = 2nd Feb then Jan
should
have 0 days. As start dates and end dates could be any dates in
the
year.
Also a campaign could just run in 1 month eg 8th Jan - 15th Jan
which
=8
days.

Also is it possible to do the array where C1:N1 return the
results.

I feel I'm being a bit cheeky now, but thanks for all the help.

"Bob Phillips" wrote:

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.