Posts timestamp

I never paid great attention until recently but currently the timestamp applied to post is not accurate, I don't know what is displayed.
Currently my local time is 16:58, I'm on Paris timezone with DST enabled (which means GMT+1 +1h DST => GMT+2).
My account is configured correctly with the timezone.

EDIT: and the post timestamp is 13:58:33 which has nothing to do (approx GMT-1).

@abalaban

Yes but the problem is more big are three hours of difference. And Spain we have the same timetable that France.