find time left in month.days unit between two dates(in YEAR.MONTH.DAY)

Please help me again on the problem shown on the attached file.(My excel sheet is attached in the post)

Thank you all very much in advance, I will give your all stars if you experts help give me the answers!



1. (Urgent)

Question: Formula to find remaining duration( in months or days unit) between two dates.
Detail: the two dates, are both in 3 separate cells as Y/M/D, (instead of the date in the 1 cell) , e.g
Today's Date: Y/M/D ( in 3 separate cells) : 2014(year)=A3, 2(month)=B3, 20(day)=C3
Previous Date:Y/M/D ( in 3 separate cells) : 2011(year)=B10, 3(month)=C10, 4(day)= D10

Answer:
with the rule of 3 years membership( 2014-2011 is 3 year period);
so to calculate the expiry clock(remaining duration) the remaining date for the two dates: is 0.39 in months, and 12 in days. but whats the excel formula for them?


The excel sheet is attached in this post, you can insert the formula in the sheet or in the post here.


2. ( Can reply later)
Problem: An auto update formula for today's date (in Y/M/D , 3 cell format)

Please do not upload a picture of your file...rather, upload a sample of your workbook, showing what data you are working with, a few samples of your expected outcome is (manually entered is ok) and how you arrived at that. (exclude sensitive info). Pictures are pretty much impossible to edit, and no-one wants to re-type your data for you Also, not all members can upload picture files (Company firewalls and stuff)

Without seeing your workbook, this is probably what you want...
=IF(DATEDIF(A1,B1,"y")=0,"",DATEDIF(A1,B1,"y")&" years ")&IF(DATEDIF(A1,B1,"ym")=0,"",DATEDIF(A1,B1,"ym")&" months ")&DATEDIF(A1,B1,"md")&" days"

Hi,

Thank you for your reply and suggestion.


I think the formula you gave me is incorrect, because for each date, it is separated into 3 columns, Y/M/D. (A1,B1,C1) instead of combine all together(2/20/2014) in one cell A1.

PLEASE ALSO NOTE*( THE MEMBERSHIP LIMIT IS 3 YEARS, SO maybe there is a =3-(formula), to indicate that )

I dont see any button that allow me to upload the workbook.

Originally Posted by FDibbins

Please do not upload a picture of your file...rather, upload a sample of your workbook, showing what data you are working with, a few samples of your expected outcome is (manually entered is ok) and how you arrived at that. (exclude sensitive info). Pictures are pretty much impossible to edit, and no-one wants to re-type your data for you Also, not all members can upload picture files (Company firewalls and stuff)

Without seeing your workbook, this is probably what you want...
=IF(DATEDIF(A1,B1,"y")=0,"",DATEDIF(A1,B1,"y")&" years ")&IF(DATEDIF(A1,B1,"ym")=0,"",DATEDIF(A1,B1,"ym")&" months ")&DATEDIF(A1,B1,"md")&" days"

It's hard to rush anything when you have to recreate the whole thing from scratch, but here is what I got:

=DATEDIF(DATE($C$5,$D$5,$E$5),DATE($C$5,D7,E7),"ym") and copied down

I'm not sure what you mean by decimal days. You don't have any hours included, so no difference would show a fraction of a day.

Maybe you meant a fraction of a month? You could approximate a day:month fraction with this:

=DATEDIF(DATE($C$5,$D$5,$E$5),DATE($C$5,D7,E7),"ym")+(DATEDIF(DATE($C$5,$D$5,$E$5),DATE($C$5,D7,E7),"md")*12/365.25)


You can upload a sample by going to Go Advanced, scroll to the bottom, click manage attachments, and browse to your file and upload it.

That formula is based on dates being in 1 cell (which is where a real date should be)

To attach a file to your post,
click advanced (next to quick post),
scroll down until you see "manage file",
click that and select "add files" (top right corner).
click "select files" find your file, click "open" click "upload" click 'done" bottom right. click "submit reply"

Once the upload is completed the file name will appear below the input boxes in this window.
You can then close the window to return to the new post screen.

I dont know why ??? the attachments are not able to access..

Please check the attachment

For days until expiry I think you can use this formula

=DATE(B10+3,C10,D10)-DATE(A$3,B$3,C$3)

That gives 11 for your example

I don't know how you get 0.39, why that amount - what are the expected results for the other rows?

thank you,

If with the rule of 3 years membership, (2011/3/4-2014/3/04, membership ends)and we count the days left from 2014/2/21 - 2014/3/4, it is 12 days left in the membership.

And if i convert 12 days to months, its 0.39 months.(using an online calculator)

why is it 11 days using your formula?

Originally Posted by daddylonglegs

For days until expiry I think you can use this formula

=DATE(B10+3,C10,D10)-DATE(A$3,B$3,C$3)

That gives 11 for your example

I don't know how you get 0.39, why that amount - what are the expected results for the other rows?

Originally Posted by xcfeng95

And if i convert 12 days to months, its 0.39 months.(using an online calculator)

Clearly months have a variable number of days so there is no "correct" way to convert days to a decimal number of months, it depends how you decide to do the calculation, you can treat a month as 30 days or use some other method

Originally Posted by xcfeng95

why is it 11 days using your formula?

How many days is it from today until tomorrow? - You might say one day, but if you count both today and tomorrow you would say 2, so presumably you are counting both today and the expiry date - in which case you can just use +1 on the end of my suggested formula.

I'm not sure what you want the results to be. If you divide 12 by 30 you'll get 0.4, so I'm assuming the divisor used is something like 365/12 so try

=(DATE(B10+3,C10,D10)-DATE(A$3,B$3,C$3)+1)/365*12