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Editorial Team
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Asked: 2026-06-03T09:29:54+00:00

You must be aware of the .NET method DateTime.FromOADate(double d). I need to implement

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You must be aware of the .NET method “DateTime.FromOADate(double d)”.
I need to implement the same functionality in javascript. i.e given a double value like “40967.6424503935” it has to be converted to “2/28/2012 3:25:07 PM”
Can someone please help me out?

Thanks in advance!

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1 Answer

  1. Editorial Team

    The automation date is the number of days since January 1, 1900 (with the year 1900 strangely being treated as a leap year). So a conversion is:

    var oaDate = 40967.6424503935;
var date = new Date();
date.setTime((oaDate - 25569) * 24 * 3600 * 1000);
alert(date);

    This solution creates a UTC date. When you display it, it’ll be displayed in your local timezone. Depending on whether your date is a local date or a UTC date, this is correct or will require some additional timezone fiddling.

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