[mso] Re: Excel Date Format Problem

  • From: Wilson Baptista Junior <wilsonbaptista@xxxxxxxxxxxx>
  • To: mso@xxxxxxxxxxxxx
  • Date: Wed, 01 Jul 2009 18:31:58 -0300

Excel has a setting to use either dates starting from january 1st, 1900 or from 
january 2, 1904 (Dates are stored in Excel as a number of days, hours, minutes 
and seconds counting from a starting date). The default setting for Excel for 
Windows is 1900.  This was originally intended to keep compatibility between 
Excel for Windows (1900 starting date) and Excel for Macintosh (1904 starting 
date).
Your spreadsheet was created either on a Mac or on an Windows Excel 
installation configured to keep dates like the Mac.

Wilson
 
At 13:48 1/7/2009 -0400,larryspcremedies@xxxxxxx wrote:
>Hi guys,
>I received a spreadsheet with a date column that?was originally formated with 
>the "*mm/dd/yyyy" format (note the star at the front). I do not know what 
>version of Excel was originally used to create the spreadsheet or on what 
>platform.
>
>The interesting problem about it is that the date is displayed four years 
>and?one day in the future.
>
>For instance, the date in in one cell is displayed as "7/8/1992? 1:26:24 AM" 
>when it should be "7/7/1988? 1:26:24 AM". If I copy the cell to a new 
>spreadsheet it displays correctly. The cell contents of both the old and new 
>spreadsheets, if displayed as a decimal number,?is 32331.06 This?corresponds 
>to the example?given in?"How to use dates and times in Excel"?in 
>http://support.microsoft.com/kb/214094?
>
>No matter what I do in regard to formatting (changing it from date to text, to 
>general to any other format), I can't get the date cells to show the correct 
>date in the old spreadheet. I even tried switching between Excel 2008 and 2007 
>... no joy in Mudville.
>
>It's obvious?the problem is?somehow releated to leap years
>
>I know what to do to correct the data in the spreadsheet, i.e., copy the whole 
>dang spreadsheet from the problematical spreadsheet into a new spreadsheet, 
>but I sure would like an explanation and thought I'd share this with you guys 
>as a "Humph! I should check the dates in this spreadsheet"?
>
>Has anyone ever had or seen?this sort of problem?
>
>Larry


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