How can I convert Java dates to MATLAB dates and retain daylight saving time details when using MATLAB 7.9 (R2009a)?

23 Oct 2009
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I have a Java program that returns a list of dates to MATLAB. I would like to convert these days to MATLAB dates while retaining the daylight saving time and other details of the dates.

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 Accepted Answer

MathWorks Support Team
MathWorks Support Team on 23 Oct 2009

1 vote

In order to do this, you will need to use the Java class "Calendar", as follows:
Calendar cal = cal.setTimeZone(TimeZone.getTimeZone("GMT"));
javaSerialDate = cal.getTimeInMillis() - cal.get(cal.ZONE_OFFSET) - cal.get(cal.DST_OFFSET);
You can then convert the date to a MATLAB date with the following MATLAB code:
matlabSerialDate = javaSerialDate / 1000 / 3600 / 24 + datenum('1970-01-01')
% -OR-
matlabSerialDate = datenum([1970 1 1 0 0 javaSerialDate / 1000])

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