Ask.com serves up a special holiday logo filled with jack-o-lanterns and the color black.
ask.com/

Note that the hyperlinks on the page take you to either a info about the day*
   (from Spooky Sounds to Games and Ghost Stories).
ask.com/web?q=Halloween&qs ...

In some cases, this result will appear,
ask.com/web?q=Last+minute+Hall ...
with last minute costume ideas.

*NOTE, Ask.com offers these special results with holiday info for many days including Memorial Day, Thanksgiving, Hannukah, and Palm Sunday.
ask.com/web?q=memorial+day& ...
ask.com/web?q=thanksgiving& ...
ask.com/web?o=0&qsrc=19&am ...
ask.com/web?q=palm+sunday& ...

For posterity:

aycu12.webshots.com/image/4531 ...

i really like this... the google way of doing this is rather limited (only the logo)

I like the Ask approach as well. Of course to be more elaborate would just be unGoogle.

TonyB

i really liked it too.. :)

speaking of Halloween, look what Yahoo! did :
events.yahoo.com/halloween06/

real cool!