Here is the current calendar for all upcoming tournaments:
http://en.lichess.org/tournament/PuGe4JvN BitChess Hyperbullet
http://en.lichess.org/tournament/nnnqPEA2 BitChess Hyperbullet
http://en.lichess.org/tournament/98EXwO9a Crazyhouse Weekly V
http://en.lichess.org/tournament/JspsI5A9 Crazyhouse Weekly VI
http://en.lichess.org/tournament/PFutQwgX Crazyhouse Weekly VII
http://en.lichess.org/tournament/nYPEZdg8 Crazyhouse Weekly VIII
http://en.lichess.org/tournament/YbhJp03z Crazyhouse Madness
http://en.lichess.org/tournament/98EXwO9a Crazyhouse Madness
http://en.lichess.org/tournament/3BNw7qRr Crazyhouse Madness
http://en.lichess.org/tournament/MD9zE8CC Crazyhouse Madness
http://en.lichess.org/tournament/ntPzVSan Crazyhouse Madness
http://en.lichess.org/tournament/PuGe4JvN BitChess Hyperbullet
http://en.lichess.org/tournament/nnnqPEA2 BitChess Hyperbullet
http://en.lichess.org/tournament/98EXwO9a Crazyhouse Weekly V
http://en.lichess.org/tournament/JspsI5A9 Crazyhouse Weekly VI
http://en.lichess.org/tournament/PFutQwgX Crazyhouse Weekly VII
http://en.lichess.org/tournament/nYPEZdg8 Crazyhouse Weekly VIII
http://en.lichess.org/tournament/YbhJp03z Crazyhouse Madness
http://en.lichess.org/tournament/98EXwO9a Crazyhouse Madness
http://en.lichess.org/tournament/3BNw7qRr Crazyhouse Madness
http://en.lichess.org/tournament/MD9zE8CC Crazyhouse Madness
http://en.lichess.org/tournament/ntPzVSan Crazyhouse Madness