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Excel User Function to Calculate Date Minus One Year

Posted on 2015-01-06
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Last Modified: 2015-01-07
I am looking for a custom function for Excel 2010 that will take a date such as 5/25/2015 and turn it into 5/25/2014. I am entering dates of receipts for 2014.  When I enter 5/25 it defaults to 2015 when I want to be 2014.
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Question by:Alex Campbell
8 Comments
 
LVL 48

Expert Comment

by:Wayne Taylor (webtubbs)
ID: 40534845
You can use this formula...

    =DATE(YEAR(A1)-1, MONTH(A1), DAY(A1))

...where cell A1 contains the date.
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Expert Comment

by:Alan
ID: 40534850
Hi,

If you enter a date with only the day / month, excel assumes you mean the current year.

One way to make it use 2014 instead, is to just adjust your computer clock to a year ago while you are doing the data entry, and then change it back again after.

Alan.
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Accepted Solution

by:
krishnakrkc earned 2000 total points
ID: 40534863
Or you can use this formula as well.

=EDATE(A1,-12)

Kris
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LVL 34

Expert Comment

by:Rob Henson
ID: 40535424
Expanding on Alan's comment, Excel assumes current year so for entries where you know it is prior year ensure you enter the year as well, ie 5/25/14.

Thanks
Rob H
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Expert Comment

by:barry houdini
ID: 40535681
If you have a range of date values which all have the year 2015 but you need them to be 2014 then a quick way to change them all without formulas is as follows:

put 365 in any blank cell and copy that cell
select range of dates to convert then "right-click" and choose "Paste Special" from menu and in the dialog box under "operation" choose "subtract"
Choose "OK" then press "Esc" key

You may need to reformat the dates in your required date format

regards, barry
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Expert Comment

by:Rob Henson
ID: 40535748
Or do a Find & Replace for 2015 replacing with 2014.
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Expert Comment

by:barry houdini
ID: 40535780
Hey Rob,

Nice one - I didn't know that would work with real dates, assumed it would only work with text values

Learn something every day........

regards, barry
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Author Closing Comment

by:Alex Campbell
ID: 40536385
Works well in my test and I like it that is short as well as dynamic.
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