How to find the absolution date?

Question

Benson Gou 2020-6-9

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https://ww2.mathworks.cn/matlabcentral/answers/545264-how-to-find-the-absolution-date

评论： Benson Gou 2020-6-9

Dear All,

I think it is hard to find out the absolute date (current date). Because the computer date can be changed, for example, today is June 09, 2020, if I run datetime, it could find June 09, 2020. But if I change my computer date to 09 May 2020, datetime will give me 09 May 2020 which is Not the correct date of today. Is there a way to solve this problem?

Thanks a lot.

Benson

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Answer 1

David Hill 2020-6-9

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https://ww2.mathworks.cn/matlabcentral/answers/545264-how-to-find-the-absolution-date#answer_448760

在 MATLAB Online 中打开

A simple search showed several possible solutions.

s1 = webread('https://tycho.usno.navy.mil/cgi-bin/timer.pl');
s2 = regexp(s1, '<BR>(.*)\sUTC','tokens','once');
t = datetime(s2,'InputFormat','MMM. dd, HH:mm:ss');