Calculating to add years - including leap year

[MareskiCP]

I have a function that needs to add 3 years to a date field. I am currently
adding 1095 days (3 years x 365) to the base number, but if there is a leap
year in those three, I'm off by one day. How can I add three years and make
sure that the extra day is included if one year is a leap year?

 

[Peo Sjoblom]

One possible way

=DATE(YEAR(F1)+3,MONTH(F1),DAY(F1))


where F1 holds the date you want to add 3 years to

Note that if the date in F1 is for instance 02/29/08 then my formula will
return
03/01/11

 

[MareskiCP]

Other users enter a date in a given cell, and I have another cell that should
calculate three years out from that date. I can't just add 1095 days... how
can I write the function to add 3 years to a different date field? I need to
get your formula below to recognize that the date for (F1) comes from another
cell.

 

[Peo Sjoblom]

That's what it does

If you put a date in F1 (in my example) and format the cell with the formula
as a date you will get a date with 3 years added and it will take leap years
into consideration

 

[Teethless mama]

Try this:
=EDATE(A1,12*3)

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