Via The Inktober Initiative by Jake Parker:
Every October, artists all over the world take on the InkTober drawing challenge by doing one ink drawing a day the entire month.
I created InkTober in 2009 as a challenge to improve my inking skills and develop positive drawing habits. It has since grown into a worldwide endeavor with thousands of artists taking on the challenge every year.
Anyone can do InkTober, just pick up a pen and start drawing.