This is an art challenge running weekly. What? Create an image based on the weekly theme posted on the official website on Friday Where, how to take part: Post the image to your own gallery, submit a link at illustrationfriday.com
This is a creative challenge running annually from September 1st to 30th What's the challenge? Draw using sepia colours Where/How to take part: Post anywhere, using the tag “sepiatember”
This is an annual creative challenge running during the full week of January. What's the challenge? Draw yourself as a witch (stories are OK, too) Where, how to take part: Post on tumblr using the tag “witchsona week” or submit to witchsona-week.tumblr.com
This is a creative challenge taking place anually on the first February What's the challenge? Draw a comic about each hour that you are awake Where and how to take part: Post anywhere, using the tag “hourly comic day”(?) More info: More info: Tumblr posts tagged “hourly comic day”, Hourly comic day on Know your meme
This is an annual writing-related challenge running from March 1st to 31st What's the challenge? Spend a total of 50 hours editing a novel (such as last November’s NaNoWriMo manuscript) Where/How to take part: Sign up on official page www.nanoedmo.com and track time spent editing there
This is a creative challenge running from April 1st to 30th What's the challenge? Draw fairies or other fae, ideally one per day Where and how to take part: Post anywhere, using the tag “faepril”.
This is a writing challenge running annually in April and July. What's the challenge? Set yourself a wordcount goal and meet it. Where, how to take part: Sign up on the official website, campnanowrimo.org
This is an art challenge running annually from May 1st to 31st What's the challenge? Draw mermaids, ideally one per day Where/How to take part: Post anywhere using the tag “mermay”
When? June 1st to June 30th What? Create details of a world you are creating. Writing or art are welcome; there is a prompts list. Where, how to take part: worldbuildingjune.tumblr.com