Excluding leap days in a formula
 

Is there an excel function which could subtract (-1) from a formula if the
dates included the leap day? I don't want to count that one additional day
in a leap year; I know I can include a -1 in my formula, but I'm looking for
something that will decide if it's a leap year and automatically subtract it
from my date difference formula.

Excluding leap days in a formula
 

On Thu, 11 Dec 2008 05:05:00 -0800, PMBO
wrote:

Is there an excel function which could subtract (-1) from a formula if the
dates included the leap day? I don't want to count that one additional day
in a leap year; I know I can include a -1 in my formula, but I'm looking for
something that will decide if it's a leap year and automatically subtract it
from my date difference formula.


Your formula can be altered to not count Feb 29. Post your formula and someone
will show you how to account for that.
--ron

Excluding leap days in a formula
 

Ron -
I'm using a simple datedif =DATEDIF(A1,A2,"d")

"Ron Rosenfeld" wrote:

On Thu, 11 Dec 2008 05:05:00 -0800, PMBO
wrote:

Is there an excel function which could subtract (-1) from a formula if the
dates included the leap day? I don't want to count that one additional day
in a leap year; I know I can include a -1 in my formula, but I'm looking for
something that will decide if it's a leap year and automatically subtract it
from my date difference formula.


Your formula can be altered to not count Feb 29. Post your formula and someone
will show you how to account for that.
--ron

Excluding leap days in a formula
 

I'm not sure why you are using =DATEDIF(A1,A2,"d") instead of =A2-A1, but it
may be worth trying:
=(YEAR(A2)-YEAR(A1)-((YEAR(A2)-YEAR(A1))DATEDIF(A1,A2,"y")))*365+DATEDIF(A1,A2," yd")You may, of course, be able to simplify that.I assume that if there is more than one Feb 29 in the period, you want tosubtract one for each?--David Biddulph"PMBO" wrote in ... Ron - I'm using a simple datedif =DATEDIF(A1,A2,"d") "Ron Rosenfeld" wrote: On Thu, 11 Dec 2008 05:05:00 -0800, PMBO wrote: Is there an excel function which could subtract (-1) from a formula ifthe dates included the leap day? I don't want to count that one additionalday in a leap year; I know I can include a -1 in my formula, but I'm lookingfor something that will decide if it's a leap year and automaticallysubtract it from my date difference formula. Your formula can be altered to not count Feb 29. Post your formula andsomeone will show you how to account for that. --ron

Excluding leap days in a formula
 

You're right - I changed it to the simplier formula, but I tested your
formula on dates 2/1/2008 to 3/1/2008 = 29 days and 2/1/2009 to 3/1/2009 = 28
days. I don't want it to count that leap day. Any other ideas?


"David Biddulph" wrote:

I'm not sure why you are using =DATEDIF(A1,A2,"d") instead of =A2-A1, but it
may be worth trying:
=(YEAR(A2)-YEAR(A1)-((YEAR(A2)-YEAR(A1))DATEDIF(A1,A2,"y")))*365+DATEDIF(A1,A2," yd")You may, of course, be able to simplify that.I assume that if there is more than one Feb 29 in the period, you want tosubtract one for each?--David Biddulph"PMBO" wrote in ... Ron - I'm using a simple datedif =DATEDIF(A1,A2,"d") "Ron Rosenfeld" wrote: On Thu, 11 Dec 2008 05:05:00 -0800, PMBO wrote: Is there an excel function which could subtract (-1) from a formula ifthe dates included the leap day? I don't want to count that one additionalday in a leap year; I know I can include a -1 in my formula, but I'm lookingfor something that will decide if it's a leap year and automaticallysubtract it from my date difference formula. Your formula can be altered to not count Feb 29. Post your formula andsomeone will show you how to account
for that. --ron

Excluding leap days in a formula
 

On Thu, 11 Dec 2008 05:28:06 -0800, PMBO
wrote:

Ron -
I'm using a simple datedif =DATEDIF(A1,A2,"d")


This should work:

=SUMPRODUCT(--(((MONTH(ROW(INDIRECT(StartDt&":"&EndDt)))<2)+
(DAY(ROW(INDIRECT(StartDt&":"&EndDt)))<29))0))

--ron

Excluding leap days in a formula
 

Fantastic - It works perfectly. Thank You Ron.

"Ron Rosenfeld" wrote:

On Thu, 11 Dec 2008 05:28:06 -0800, PMBO
wrote:

Ron -
I'm using a simple datedif =DATEDIF(A1,A2,"d")


This should work:

=SUMPRODUCT(--(((MONTH(ROW(INDIRECT(StartDt&":"&EndDt)))<2)+
(DAY(ROW(INDIRECT(StartDt&":"&EndDt)))<29))0))

--ron

Excluding leap days in a formula
 

On Thu, 11 Dec 2008 13:10:12 -0500, Ron Rosenfeld
wrote:

On Thu, 11 Dec 2008 05:28:06 -0800, PMBO
wrote:

Ron -
I'm using a simple datedif =DATEDIF(A1,A2,"d")


This should work:

=SUMPRODUCT(--(((MONTH(ROW(INDIRECT(StartDt&":"&EndDt)))<2)+
(DAY(ROW(INDIRECT(StartDt&":"&EndDt)))<29))0) )

--ron

A quick note -- the above formula returns an inclusive count. You should
probably subtract one (1) to obtain the result you really want.
--ron