this post was submitted on 21 Oct 2023
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How about just not auto-convert everything and keep the integrity of the data unless specifically asked to? Is that so hard?
Excel is never ever going to break backwards compatability. In fact, quite some "features" in Excel are just there to stay bug-for-bug compatible with existing systems.
Example: Excel stores dates internally as a float - called the serial date, you can view it by running DATEVALUE on any cell that contains a date. It is supposed to be the number of days since 1 January 1900. However, since early Excel versions had to be compatible with Lotus1-2-3, Excel had to be compatible with a bug in Lotus123: they had erroneously assumed 1900 to be a leap year. In addition, the indexing is off by one. So the actual 0 epoch of an Excel serial date is 30 December 1899 for all dates starting 1 March 1900.