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OpenOffice.org stores dates as text strings like “yyyy-mm-dd”.
 
OpenOffice.org stores dates as text strings like “yyyy-mm-dd”.
  
MS-Excel stores dates as a number representing the number of days since January 1, 1900 (and as an aside, erroneously assumes 1900 to be a leap year). (Why mention MS-Excel here? See below:)
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MS-Excel stores dates as a number representing the number of days since January 1, 1900 (and as an aside, erroneously assumes 1900 to be a leap year).
  
 
Now, converting OpenOffice.org date cell values (actually, character strings flagged by “date” attributes) into Octave looks pretty straightforward. But when the ODS spreadsheet was originally an Excel spreadsheet converted by OpenOffice.org, the date cells can either be OOo date values (i.e.,strings) OR old numerical values from the Excel spreadsheet.
 
Now, converting OpenOffice.org date cell values (actually, character strings flagged by “date” attributes) into Octave looks pretty straightforward. But when the ODS spreadsheet was originally an Excel spreadsheet converted by OpenOffice.org, the date cells can either be OOo date values (i.e.,strings) OR old numerical values from the Excel spreadsheet.

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