Shift in datetime relative to epoch

When I use "datetime" to convert seconds since an epoch (like unix time stamp, GPS time) I get on one PC the result shifted by 12 hours:

datetime(0,'convertfrom', 'epochtime','Epoch','1970-01-01 00:00:00')

ans =

datetime

1970-01-01 12:00:00.000

I only get this on one PC with 2018b, but not in 2016b. Also on another computer with 2018b I get what I expect:

ans =

datetime

1970-01-01 00:00:00.000

I am not sure what causes this shift. I do not think it can be related to time zones, it should only be +-1h.

[Steven Lord]

I agree with Cris's suspicion. I'd check that the default format is the same between the two machines. See the Preferences for the Command Window.

Answer 1

[Cris LaPierre]

Is it displaying in 24 hour format on one computer, and 12 hour format on another?

t = datetime(0,'convertfrom', 'epochtime','Epoch','1970-01-01 00:00:00')

t = datetime
   01-Jan-1970

% display in 24 hr format
t.Format = 'dd-MMM-yyyy HH:mm:ss'

t = datetime
   01-Jan-1970 00:00:00

% display in 12 hr format
t.Format = 'dd-MMM-yyyy hh:mm:ss'

t = datetime
   01-Jan-1970 12:00:00

[Peter Perkins]

Likely the datetime display format preference has been changed on the one machine.

[Hans Wurst]

You are right. I changed the default time format to include subseconds years ago, and used hh, not HH. Thanks!