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#31
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Days to next anniversary
Ok....I think I may have solved that issue:
=IF(A1,LOOKUP(365,DATE(YEAR(NOW())+{0,1},MONTH(A1) ,DAY(A1)-1)+1-TODAY()),"") (Amusing....all this fuss to accommodate a one-day-every-four-years occurrence.) *********** Regards, Ron XL2002, WinXP "Rick Rothstein (MVP - VB)" wrote: No, you are not dense... there is a problem, but it is not year-long like I first thought... it occurs for a start date of February 29th of a leap year with a TODAY date between January 1st and February 28th of a non leap year. Hire Date: 29-FEB-2004 (or any leap year) Today: 27-FEB-2007 (or any non leap year) Calculated Difference = 2 days Hire Date: 1-MAR-2004 (or any leap year) Today: 27-FEB-2007 (or any non leap year) Calculated Difference = 2 days Both Hire dates produce the same difference. I mistakenly thought that carried throughout the year, but the problem actually is how to handle the collapsing of the leap day into years where that date does not exist. Rick "Ron Coderre" wrote in message ... Perhaps I'm being dense....but.... Hire Date: 01-MAR-2000 Today : 27-FEB-2007 Per the formula: 2 days until the next anniversary date The math: Hire Date Anniversary: 01-MAR-2007 Less: Today's date : 27-FEB-2007 Equals : 2 days Can you clarify what you discovered? *********** Regards, Ron XL2002, WinXP "Rick Rothstein (MVP - VB)" wrote: We can trim a couple mo =IF(A1,LOOKUP(365,((TEXT(A1,"m/d/")&YEAR(NOW())+{0,1})-TODAY())),"") Startin' to look pretty good! Upon further testing of my previous offering I find it fails if the hire date is a leap day so I'll put that in the round file and "stash" this beauty cooked up by Ron. Nope, it is not starting to look good at all... this formula, and Ron's original, also get tripped up by a start date of 02/29/2000 (or any February 29th in a proper leap year)... it happens whenever the "TODAY" date is anywhere within the range of January 1st to February 28th. Unfortunately, that is the least of the problems... As it turns out, ALL of the formulas submitted so far (including Ron's and its variations) will produce an incorrect calculation if the TODAY date is anywhere within the range of January 1st to February 28th of a NON leap year and the start date is any day on or after March 1st of a leap year... under those conditions, the date difference will be one day less than it is supposed to be. To test what I am saying, try a Start Date of March 1, 2000 and a TODAY date of February 27, 2007. There should be 3 days difference between these days (Feb 28, Feb 29 and Mar 1), but all formulas report 2 days... and this missing day is carried forward for Start Dates up to and including December 31, 2007. Rick |
#32
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Days to next anniversary
Yes, it looks like that takes care of the error generated for a February
29th start date (and it still is significantly shorter than the formula I postedg); but the (probably unsolvable) problem of how to deal with February 29th start dates when the TODAY value is before March 1st of a non leap year remains. I guess a February 29th and March 1st leap year start dates will always be the same number of days away from the TODAY date for that condition. Perhaps the best way to handle this is never set a start date of leap year... make it company policy to push a February 29th start date to the first business day on or after March 1st. Rick "Ron Coderre" wrote in message ... Ok....I think I may have solved that issue: =IF(A1,LOOKUP(365,DATE(YEAR(NOW())+{0,1},MONTH(A1) ,DAY(A1)-1)+1-TODAY()),"") (Amusing....all this fuss to accommodate a one-day-every-four-years occurrence.) *********** Regards, Ron XL2002, WinXP "Rick Rothstein (MVP - VB)" wrote: No, you are not dense... there is a problem, but it is not year-long like I first thought... it occurs for a start date of February 29th of a leap year with a TODAY date between January 1st and February 28th of a non leap year. Hire Date: 29-FEB-2004 (or any leap year) Today: 27-FEB-2007 (or any non leap year) Calculated Difference = 2 days Hire Date: 1-MAR-2004 (or any leap year) Today: 27-FEB-2007 (or any non leap year) Calculated Difference = 2 days Both Hire dates produce the same difference. I mistakenly thought that carried throughout the year, but the problem actually is how to handle the collapsing of the leap day into years where that date does not exist. Rick "Ron Coderre" wrote in message ... Perhaps I'm being dense....but.... Hire Date: 01-MAR-2000 Today : 27-FEB-2007 Per the formula: 2 days until the next anniversary date The math: Hire Date Anniversary: 01-MAR-2007 Less: Today's date : 27-FEB-2007 Equals : 2 days Can you clarify what you discovered? *********** Regards, Ron XL2002, WinXP "Rick Rothstein (MVP - VB)" wrote: We can trim a couple mo =IF(A1,LOOKUP(365,((TEXT(A1,"m/d/")&YEAR(NOW())+{0,1})-TODAY())),"") Startin' to look pretty good! Upon further testing of my previous offering I find it fails if the hire date is a leap day so I'll put that in the round file and "stash" this beauty cooked up by Ron. Nope, it is not starting to look good at all... this formula, and Ron's original, also get tripped up by a start date of 02/29/2000 (or any February 29th in a proper leap year)... it happens whenever the "TODAY" date is anywhere within the range of January 1st to February 28th. Unfortunately, that is the least of the problems... As it turns out, ALL of the formulas submitted so far (including Ron's and its variations) will produce an incorrect calculation if the TODAY date is anywhere within the range of January 1st to February 28th of a NON leap year and the start date is any day on or after March 1st of a leap year... under those conditions, the date difference will be one day less than it is supposed to be. To test what I am saying, try a Start Date of March 1, 2000 and a TODAY date of February 27, 2007. There should be 3 days difference between these days (Feb 28, Feb 29 and Mar 1), but all formulas report 2 days... and this missing day is carried forward for Start Dates up to and including December 31, 2007. Rick |
#33
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Days to next anniversary
To fix this you'd need to subtract 1 if the start date is a leap day and
YEAR(TODAY()) is a non-leap year. What I came up with to do this is just as long as the original formula: -AND(MONTH(A2)=2,DAY(A2)=29,ISERR(--TEXT("2/29/"&YEAR(NOW()),"m/d/yy"))) -- Biff Microsoft Excel MVP "Rick Rothstein (MVP - VB)" wrote in message ... Yes, it looks like that takes care of the error generated for a February 29th start date (and it still is significantly shorter than the formula I postedg); but the (probably unsolvable) problem of how to deal with February 29th start dates when the TODAY value is before March 1st of a non leap year remains. I guess a February 29th and March 1st leap year start dates will always be the same number of days away from the TODAY date for that condition. Perhaps the best way to handle this is never set a start date of leap year... make it company policy to push a February 29th start date to the first business day on or after March 1st. Rick "Ron Coderre" wrote in message ... Ok....I think I may have solved that issue: =IF(A1,LOOKUP(365,DATE(YEAR(NOW())+{0,1},MONTH(A1) ,DAY(A1)-1)+1-TODAY()),"") (Amusing....all this fuss to accommodate a one-day-every-four-years occurrence.) *********** Regards, Ron XL2002, WinXP "Rick Rothstein (MVP - VB)" wrote: No, you are not dense... there is a problem, but it is not year-long like I first thought... it occurs for a start date of February 29th of a leap year with a TODAY date between January 1st and February 28th of a non leap year. Hire Date: 29-FEB-2004 (or any leap year) Today: 27-FEB-2007 (or any non leap year) Calculated Difference = 2 days Hire Date: 1-MAR-2004 (or any leap year) Today: 27-FEB-2007 (or any non leap year) Calculated Difference = 2 days Both Hire dates produce the same difference. I mistakenly thought that carried throughout the year, but the problem actually is how to handle the collapsing of the leap day into years where that date does not exist. Rick "Ron Coderre" wrote in message ... Perhaps I'm being dense....but.... Hire Date: 01-MAR-2000 Today : 27-FEB-2007 Per the formula: 2 days until the next anniversary date The math: Hire Date Anniversary: 01-MAR-2007 Less: Today's date : 27-FEB-2007 Equals : 2 days Can you clarify what you discovered? *********** Regards, Ron XL2002, WinXP "Rick Rothstein (MVP - VB)" wrote: We can trim a couple mo =IF(A1,LOOKUP(365,((TEXT(A1,"m/d/")&YEAR(NOW())+{0,1})-TODAY())),"") Startin' to look pretty good! Upon further testing of my previous offering I find it fails if the hire date is a leap day so I'll put that in the round file and "stash" this beauty cooked up by Ron. Nope, it is not starting to look good at all... this formula, and Ron's original, also get tripped up by a start date of 02/29/2000 (or any February 29th in a proper leap year)... it happens whenever the "TODAY" date is anywhere within the range of January 1st to February 28th. Unfortunately, that is the least of the problems... As it turns out, ALL of the formulas submitted so far (including Ron's and its variations) will produce an incorrect calculation if the TODAY date is anywhere within the range of January 1st to February 28th of a NON leap year and the start date is any day on or after March 1st of a leap year... under those conditions, the date difference will be one day less than it is supposed to be. To test what I am saying, try a Start Date of March 1, 2000 and a TODAY date of February 27, 2007. There should be 3 days difference between these days (Feb 28, Feb 29 and Mar 1), but all formulas report 2 days... and this missing day is carried forward for Start Dates up to and including December 31, 2007. Rick |
#34
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Days to next anniversary
While you can subtract (or even add) 1 to the start date, I just don't know
that there is a "fix" for the problem. In a non-leap year, there is no February 29th; so if the start date is February 29th, you are stuck considering it as February 28th (last day of the month stays last day of the month) or as March 1st (the day after February 28th stays the day after February 28th) for non leap years... there is no "correct" solution for the problem... a company will just have to make a policy decision on how they are willing to collapse February 29th into non leap years (or, as I suggested sort of tongue-in-cheek earlier, simply never allow February 29th to be a start date for an employee). Rick "T. Valko" wrote in message ... To fix this you'd need to subtract 1 if the start date is a leap day and YEAR(TODAY()) is a non-leap year. What I came up with to do this is just as long as the original formula: -AND(MONTH(A2)=2,DAY(A2)=29,ISERR(--TEXT("2/29/"&YEAR(NOW()),"m/d/yy"))) -- Biff Microsoft Excel MVP "Rick Rothstein (MVP - VB)" wrote in message ... Yes, it looks like that takes care of the error generated for a February 29th start date (and it still is significantly shorter than the formula I postedg); but the (probably unsolvable) problem of how to deal with February 29th start dates when the TODAY value is before March 1st of a non leap year remains. I guess a February 29th and March 1st leap year start dates will always be the same number of days away from the TODAY date for that condition. Perhaps the best way to handle this is never set a start date of leap year... make it company policy to push a February 29th start date to the first business day on or after March 1st. Rick "Ron Coderre" wrote in message ... Ok....I think I may have solved that issue: =IF(A1,LOOKUP(365,DATE(YEAR(NOW())+{0,1},MONTH(A1) ,DAY(A1)-1)+1-TODAY()),"") (Amusing....all this fuss to accommodate a one-day-every-four-years occurrence.) *********** Regards, Ron XL2002, WinXP "Rick Rothstein (MVP - VB)" wrote: No, you are not dense... there is a problem, but it is not year-long like I first thought... it occurs for a start date of February 29th of a leap year with a TODAY date between January 1st and February 28th of a non leap year. Hire Date: 29-FEB-2004 (or any leap year) Today: 27-FEB-2007 (or any non leap year) Calculated Difference = 2 days Hire Date: 1-MAR-2004 (or any leap year) Today: 27-FEB-2007 (or any non leap year) Calculated Difference = 2 days Both Hire dates produce the same difference. I mistakenly thought that carried throughout the year, but the problem actually is how to handle the collapsing of the leap day into years where that date does not exist. Rick "Ron Coderre" wrote in message ... Perhaps I'm being dense....but.... Hire Date: 01-MAR-2000 Today : 27-FEB-2007 Per the formula: 2 days until the next anniversary date The math: Hire Date Anniversary: 01-MAR-2007 Less: Today's date : 27-FEB-2007 Equals : 2 days Can you clarify what you discovered? *********** Regards, Ron XL2002, WinXP "Rick Rothstein (MVP - VB)" wrote: We can trim a couple mo =IF(A1,LOOKUP(365,((TEXT(A1,"m/d/")&YEAR(NOW())+{0,1})-TODAY())),"") Startin' to look pretty good! Upon further testing of my previous offering I find it fails if the hire date is a leap day so I'll put that in the round file and "stash" this beauty cooked up by Ron. Nope, it is not starting to look good at all... this formula, and Ron's original, also get tripped up by a start date of 02/29/2000 (or any February 29th in a proper leap year)... it happens whenever the "TODAY" date is anywhere within the range of January 1st to February 28th. Unfortunately, that is the least of the problems... As it turns out, ALL of the formulas submitted so far (including Ron's and its variations) will produce an incorrect calculation if the TODAY date is anywhere within the range of January 1st to February 28th of a NON leap year and the start date is any day on or after March 1st of a leap year... under those conditions, the date difference will be one day less than it is supposed to be. To test what I am saying, try a Start Date of March 1, 2000 and a TODAY date of February 27, 2007. There should be 3 days difference between these days (Feb 28, Feb 29 and Mar 1), but all formulas report 2 days... and this missing day is carried forward for Start Dates up to and including December 31, 2007. Rick |
#35
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Days to next anniversary
-AND(MONTH(A2)=2,DAY(A2)=29,ISERR(--TEXT("2/29/"&YEAR(NOW()),"m/d/yy")))
That non-leap year test of yours... ISERR(--TEXT("2/29/"&YEAR(NOW()),"m/d/yy"))) Why so many characters? ISERR(VALUE("2/29/"&YEAR(now()))) Savings? Eleven characters (sorry, couldn't resist). g Yes, I properly should be using DATEVALUE but, for the test being performed, I am pretty sure VALUE will work fine. Rick |
#36
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Days to next anniversary
-AND(MONTH(A2)=2,DAY(A2)=29,ISERR(--TEXT("2/29/"&YEAR(NOW()),"m/d/yy")))
That non-leap year test of yours... ISERR(--TEXT("2/29/"&YEAR(NOW()),"m/d/yy"))) Why so many characters? ISERR(VALUE("2/29/"&YEAR(now()))) Savings? Eleven characters (sorry, couldn't resist). g More straight forward than the above... (MONTH(DATE(YEAR(NOW()),2,29))=3) Same number of characters though :-( Rick |
#37
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Days to next anniversary
I almost always go with what first pops into my head and after I've commited
myself is when I start thinking of alternatives. Like: =ISERR(--("2/29/"&YEAR(NOW()))) There seems to be almost no limit when it comes to "building" dates. We discussed this a while back. I was playing around and discoverd that stuff like this works but it shouldn't (at least you would think that it shouldn't): A1 = July =MONTH(A1&1) A1 = July1 =MONTH(A1) A1 = July0 =MONTH(A1) People started chimming in that they also never realized this sort of stuff worked. I finally understand what you mean about that 2/29 vs 3/1 deal. I think adding 1 to the start date (if a leap day) is the way to go and be done with it! If someone was born on 2/29/2000 when do they *legally* become 1 year old? 2/28/2001 or 3/1/2001? Damn those leap years! g -- Biff Microsoft Excel MVP "Rick Rothstein (MVP - VB)" wrote in message ... -AND(MONTH(A2)=2,DAY(A2)=29,ISERR(--TEXT("2/29/"&YEAR(NOW()),"m/d/yy"))) That non-leap year test of yours... ISERR(--TEXT("2/29/"&YEAR(NOW()),"m/d/yy"))) Why so many characters? ISERR(VALUE("2/29/"&YEAR(now()))) Savings? Eleven characters (sorry, couldn't resist). g Yes, I properly should be using DATEVALUE but, for the test being performed, I am pretty sure VALUE will work fine. Rick |
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