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Fixes #2942. #2943

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juanii wants to merge 1 commits from juanii/sheetjs:fix/2942 into master
pull from: juanii/sheetjs:fix/2942
merge into: sheetjs:master
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1 changed files with 4 additions and 2 deletions
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xlsx.js generated
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@ -3269,10 +3269,12 @@ function evert_arr(obj) {
return o;
}
var basedate = new Date(1899, 11, 30, 0, 0, 0); // 2209161600000
var basedate = new Date(1899, 11, 31, 0, 0, 0); // 2209075200000
var base1904 = new Date(1900, 2, 1, 0, 0, 0);
function datenum(v, date1904) {
var epoch = v.getTime();
if(date1904) epoch -= 1462*24*60*60*1000;
if(date1904) epoch -= 1461*24*60*60*1000;
else if(v >= base1904) epoch += 24*60*60*1000;
var dnthresh = basedate.getTime() + (v.getTimezoneOffset() - basedate.getTimezoneOffset()) * 60000;
return (epoch - dnthresh) / (24 * 60 * 60 * 1000);
}