-(setq gnus-summary-line-format "%U%R%z%4L %(%[%-16,16f%]%): %B %s\n"
- gnus-summary-dummy-line-format " %(%[----------------%]%): * %S\n")
+(setq gnus-summary-line-format
+ "%U%R%z%4L %(%[%-16,16f%]%): %&user-date; %B %s\n"
+ gnus-summary-dummy-line-format
+ " %(%[----------------%]%): * %S\n"
+ gnus-user-date-format-alist
+ '(((gnus-seconds-today) . "*** %H:%M")
+ (604800 . "%a %H:%M")
+ ((gnus-seconds-month) . " %a %_d")
+ ((gnus-seconds-year) . " %_d %b")
+ (t . " %b %Y")))