cp_manor_event can be played now in sb1 and sb2
You can vote for this mod under the option "Halloween!" in the map chooser. This map might not show up for a while if it has just been played because a server has to play 6 maps before it can repeat one.
The horsemann might not technically be available until valve puts it in, but I have enabled it with sourcemod. I set him to spawn on round setup end (start) and after the second point is capped he will spawn on the 3rd point.
You can also wear your halloween hats when this map is enabled. This map will be available until Halloween is over, enjoy!