December is bursting with science fiction and fantasy greatness. George R.R. Martin has a new novella set in Westeros. The Hobbit saga continues. Doctor Who's Eleventh Doctor departs. And there are loads of conventions and readings. Here's our complete guide to December's science fiction and fantasy.

Top image: Ascension by Jacqueline Koyanagi

As always, you can download the io9 calendar as a printable PDF here. And if you have any cool events for next January's calendar, drop us a line at calendar@io9.com.

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Research by Jason Krell. Design by Stephanie Fox.