skip> Doing a little date math I come up with a base date of
skip> approximately (though not quite) 1900-01-01:
...
Reading the code in BIFFRecords.py I saw this docstring:
This record specifies the base date for displaying date values. All
dates are stored as count of days past this base date. In
BIFF2-BIFF4 this record is part of the Calculation Settings Block.
In BIFF5-BIFF8 it is stored in the Workbook Globals Substream.
Record DATEMODE, BIFF2-BIFF8:
Offset Size Contents
0 2 0 = Base is 1899-Dec-31 (the cell = 1 represents
1900-Jan-01)
1 = Base is 1904-Jan-01 (the cell = 1 represents
1904-Jan-02)
Shifting my base date from 1900-01-01 to 1899-12-31 leaves me off by one. I
take it then that "count of days past this base date" must include that
date. It's too late for me to do any more poking around. Does anyone know
if I might get date floats which are offset from 1904-01-01 (I think that
was the traditional Mac start-of-epoch) or are they normalized to all be
offsets from 1899-12-31?
I noticed that there are two items on the pyExcelerator to-do list. Number
one is "documentation".
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