Subtracting Holidays from Calendar Days

[Drewpotlad]

Hi All,

I know how to subtract holidays from NETWORKDAYS in a formula by defining
them (as in Christmas Day 25/12/2008), but I have a process that is giving me
a headache. It is measured in calendar days, so at present I am doing a
simple subtraction of start date cell - end date cell of process. However, I
obviously cannot account for any holidays in year. Is there a formula/way of
doing this?

Thanks,

Drew

 

[Luke M]

Assuming start date = A2, end date = A3, holidays in B2:B50
=A3-A2-COUNTIF(B2:B50,">="&A2)+COUNTIF(B2:B50,">"&A3)

Adjust cell references as needed.

 

[Ron Rosenfeld]

Hi All,

I know how to subtract holidays from NETWORKDAYS in a formula by defining
them (as in Christmas Day 25/12/2008), but I have a process that is giving me
a headache. It is measured in calendar days, so at present I am doing a
simple subtraction of start date cell - end date cell of process. However, I
obviously cannot account for any holidays in year. Is there a formula/way of
doing this?

Thanks,

Drew

Not sure exactly what you want.

How does a "calendar day" differ from a "day"?

Do you want to include or exclude weekend days?

What do you mean by "account for any holidays in year"? Do you want to include
or exclude them?
--ron

 

[Drewpotlad]

Not sure exactly what you want.

How does a "calendar day" differ from a "day"?

Do you want to include or exclude weekend days?

What do you mean by "account for any holidays in year"? Do you want to include
or exclude them?
--ron

Hi Ron,

Basically I want to count all days including weekends. What I want to
exclude are all public holidays, such as Christmas/New Years Day and Easter
Holidays (as well as all other British Public Holidays)

Thanks,

Drew

 

[Ron Rosenfeld]

Hi Ron,

Basically I want to count all days including weekends. What I want to
exclude are all public holidays, such as Christmas/New Years Day and Easter
Holidays (as well as all other British Public Holidays)

Thanks,

Drew

Since you are comparing this to the NETWORKDAYS function, I will make the
assumption that you want an *inclusive* count (i.e. counting both the start and
end dates), which is how the NETWORKDAYS function operates.

That being the case:

Set up a range someplace and NAME it "Holidays" (or use the absolute cell
references, if you prefer).

Then try this formula:

=SUMPRODUCT(--(ISNA(MATCH(ROW(INDIRECT(Start_Date&":"&End_Date)),Holidays,0))))

Any date from Start to End will return #NA *unless* it is also found in your
list of holidays. So we just count up the number of NA's.
--ron