clock differences between 8.4 and 8.5

MHo 2009-11-08 I notice the following:

Tcl 8.4:

% info pa
8.4.19
% clock format [clock seconds] -format %c
Sonntag, 8. November 2009 21:42:24
%

(that's what I expected)

Tcl 8.5:

% info pa
8.5.7
% clock format [clock seconds] -format %c
Sun Nov  8 21:47:23 2009
%