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Create a numeric variable DATE+HOUR

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Hi. I hope you're ok.
I write this question because I want to create a new numeric variable which contains the date (i.e. 12/09/2019) and the hour (i.e. 01:15:20). I did this in Excel and the result is given in the following photo:
However, If I try to do this in MATLAB (R19b) the result is quite different.
Can you tell me if I'm doing something wrong? I don't know if the sintaxis of the date and hour are correct, and if not, what's wrong with that (I want the result given in my Excel sheet).
Thanks!
David

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Adam Danz
Adam Danz 7 Feb 2021
편집: Adam Danz 7 Feb 2021
There's rarely a good reason to use datenum rather than datetime values. See Why are datetime arrays better than datenum?
% Convert to datetime
Time = '01:15:02 12/09/19';
datetime(Time,'InputFormat','HH:mm:ss MM/dd/yy')
ans = datetime
09-Dec-2019 01:15:02
Date numbers in Excel represent the number of days since Jan 1 1900 whereas date numbers in Matlab represent the number of days since Jan 1,0000 so there's a 693960 day difference (see documentation).
If you have the Financial Toolbox you could use x2mdate / m2xdate or you could convert it on your own using the offset mentioned in the documentation.
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Adam Danz
Adam Danz 7 Feb 2021
Sure use either of the following syntaxes
Excel supports two date systems that start from 1900 or 1904 which is reason for the second argument.

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