Also on GoodReads as J L's Bibliomania:
and Litsy @jlsbibliomania
While my first love was SF, I read widely in YA, urban fantasy, police procedurals, middle-grade, and non-fiction.
Looks like Little Book Owl is no longer updating her Readathon Calendar, but Molly's Book Nook has posted one for 2017.
Looks like January is a great month for Readathons, though your options are more limited if you don't use Twitter, or haven't made the time for BookTube ramblings.