Summary: October is the first full month of autumn, and is typified by red and golden leaves, cooling temperatures, and shortening days. It was also the month of the Gaelic festival of Samhain, which would later go on to become what we in modern times know as Hallowe'en. A combination of harvest festival and festival of the dead, it was a time when the physical world and the spiritual world were drawn close together, monsters and ghosts walked the land, and people wore masks and costumes to ward off bad spirits. This month in the Garden, all of the above will happen.

[OOC] October 1: Activity check!
October 14th: One of the Incarnae, feeling unappreciated and fed up with the Queen's...Queen-ness, decides to demonstrate just how important her work is by taking a holiday. They can all fend without her for a while, see how they like it.
⇒ This is the beginning of the month's event. Her absence won't be felt immediately, but don't worry, it'll come.
October 15: The Incarnae opens a portal to another world, on which she will spend her sojourn away from her regular duties. Unfortunately, she doesn't consider that what's on the other side may be interested in checking out the Garden as well.
⇒ On the other side of the portal is a dark world of perpetual moonlight, inhabited by various dark, traditional feminine monsters. As they investigate the Gardens, they begin to corrupt and change the land around the portal. The Garden's inhabitants may also venture through the portal to discover this new world...but they may find its inhabitants less than hospitable.
[OOC] October 15: HMD Meme
⇒ The official Queen of Hearts HMD will occur on October 15th. Participation is optional and players are expected to be mature about it.
October 23: By this point it will become clear that finding and returning with the missing Incarnae is the only way to stem the traffic through the portal, and also to reverse the negative effects the dark world's inhabitants are having on the Garden and its inhabitants.
⇒ Characters will need to venture into the dark world to find and call back the prodigal Incarnae, who has absolutely no idea what's been going on in her absence. There will be a way for non-combat characters to safely participate in this. This event should be wrapped up before month's end, by which time the Garden will have returned to normal. Mostly.