Weekday missing in date(1) output

[Thomas Eberhardt]

% uname -a
FreeBSD clarence.ocp.lan 11.0-ALPHA6 FreeBSD 11.0-ALPHA6 #0 r302324: Sun Jul  3 21:27:41 CEST 2016     thomas at clarence.ocp.lan:/usr/obj/usr/src/sys/GENERIC-NODEBUG  amd64
% env LANG=en_US.UTF-8 date
Sunday, July  3, 2016 at 10:14:21 PM CEST
% env LANG=de_DE.UTF-8 date
 3. Juli 2016 um 22:14:22 CEST

stable10 gives:
% env LANG=de_DE.UTF-8 date
So  3 Jul 2016 19:34:18 CEST

Is this intentional?

Regards,
Thomas Eberhardt