As usual, the Strange Horizons fiction department is temporarily closing to submissions during the month of December this year. If you want us to consider a story before the end of the year, submit it before the end of November.
(This doesn't apply to other departments, just fiction.)
Also as usual, we expect to be completely swamped with submissions in January, and possibly well into February. We probably won't be paying as much attention to each individual submission in January as we normally do, and we'll probably be sending a lot of form rejection letters. Don't take it personally.