Question on datestr()

[address@hidden]

Dear listmembers,
trying to use "datestr" gives me unexpected results with hour / minute / second 
- information. I am issueing

datestr(date,31)

and get
ans = 2016-01-25 00:00:00

I am issueing

datestr(13)

and get
ans = 00:00:00

In contrast my watch and "date" tell me 
Mo 25. Jan 09:53:34 CET 2016

octave is 
octave --version
GNU Octave, version 4.0.0
Copyright (C) 2015 John W. Eaton and others.
This is free software; see the source code for copying conditions.
There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.

Octave was configured for "x86_64-suse-linux-gnu".

Additional information about Octave is available at http://www.octave.org.

Please contribute if you find this software useful.
For more information, visit http://www.octave.org/get-involved.html

Read http://www.octave.org/bugs.html to learn how to submit bug reports.


Thank you very much for lookint into this,
take care




Dieter Jurzitza