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List of timed artistic challenges
These challenges happen throughout the year and are not a year in length.
- 48 Hour Film Project: Make a film in 48 hours. The 48 Hour Film Project team tours different cities year round. There is a fee to enter officially.
- National Novel Continuing Month (NaNoCoMo): Continue a novel you've started.
- Book in a Week: Participants write a book during the first full week of each month.
- National Novel Writing Day: Write a novel in a day. Self-organized, but people have done it.
- National Blog Posting Month (NaBloPoMo): Post in your blog every day for a month. Originally in November, but now you can participate year round.
- Album-a-Day: Write, perform, and record a musical album in a single day.
- Script Race: Write a script in a month. This happens every month.
- 100 Sketches, 100 Days: Draw one sketch a day for 100 days and upload them if you wish. You can begin this challenge whenever you want to.
- National Novel Plotting Month: Set a plotting goal (characters/plot/full novel, etc.) and finish it in a month. This happens every month.
- SongFight!: Write a song with the given title. Listeners vote, winner gets bragging rights. New title posted every ten days or so.
- SongFu: Write a song based on monthly prompt. Deadline is two weeks from prompt posting.
These challenges start at various times throughout the year and last for a full year.
- WriYe: Write several novels in a year, often involving setting your own goals.
- National Novel Publishing Year (NaNoPubYe): Prepare and submit a novel for publication in a year.
- 6 Months, 6 Novels: Write a novel every other month, starting in January.
- Milwordy: The quest to write a million words in a year.
- The 365 Project: Take a photo every day for a year.
- January Novel Writing Month (JanNoWriMo): Write 50,000 words (or another goal) in January.
- Story-driven Game Writing Month (StoGaWriMo): Write 20,000 words of rules, worlds, and flavor text in a game in the month of January.
- Historical Novel Writing Month (HistNoWriMo): Choose any word goal write a historical novel in one month. Many different genres available.
- Random Genre Month: Write a 50,000 word novel of a randomly chosen genre.
- January Animation Month: Create 31 animations in January
- Fantasy Novel Writing Month: Choose your own word count goal and write a fantasy novel in January.
- Choose-Your-Own Novel Month: Create and finish a choose-your-own-adventure or interactive fiction game in January.
- Thing A Day: Participants make a thing a day in February and post it to a collective blog.
- February Album Writing Month (FAWM): Write fourteen songs in the month of February.
- February Novel Writing Month: Write a novel in February. Set your word count goal. Write a new novel or work on a WiP.
- RPM Challenge: Record a ten-song or 35-minute album in February. Writing is encouraged to happen in February.
- National Haiku Writing Month: Write a haiku every day in February.
- Lettermo: Write and mail 24 physical letters in the month of February. (Why 24? There are four Sundays and one US holiday in February.)
- Wikiwrimo Writing Month: Edit thirty pages on this wiki during the month of February.
- National Novel Editing Month (NaNoEdMo): Edit for at least fifty hours in March.
- March Novel Writing Month (MarNoWriMo) : Set your own goal to write or rewrite in March.
- Camp NaNoWriMo: Write a 50,000 word (or other goal) novel or script in a month. Run by the Office of Letters and Light. Camp NaNoWriMo 2013's first session will happen in April.
- April Fools: Set your own goal to write in April. Any form of writing is accepted.
- National Poem Writing Month (NaPoWriMo): Write a poem a day for the month of April.
- Refrigerator Poetry Writing Month (RePoWriMo): Write a poem using refrigerator magnets every day in April.
- Blogging from A to Z Challenge: Blog thematically through the alphabet posting every day in April except Sundays.
- May Novel Writing Month (MayNoWriMo): Write 50,000 words in May. A spinoff of NaNoPubYe.
- National Epic Poetry Month (NEPMo): Write a 5,000-line epic poem in May.
- Story-A-Day in May: Write a short story every day in May.
- Noveldom and Beyond (No&Be): Read over 10,000 pages in 93 days; No&Be starts on May 1st and continues until July 31st.
- Southern Cross Novel Challenge (SoCNoC): Write 50,000 words in June. A half-SoCNoC is also available.
- NaNoMangO: Participants draw thirty pages of sequential art. The June challenge is for those who want the extra challenge or can't participate in November.
- Write a Damn Novel in June: Write a 50,000-word novel in June.
- Solo Photo Book Month (SoFoBoMo): Take at least 35 photos and create a photo book in a "fuzzy month". SoFoBoMo 2010 goes into July, depending on when you begin.
- Camp NaNoWriMo: Write a 50,000-word (or other goal) novel or script in a month. Run by the Office of Letters and Light, Camp NaNoWriMo 2013's second session will occur in July.
- LoCoWriMo: Write a sizable piece of original fiction in a conlang. LoCoWriMo started in October 2009, with the second and third LoCoWriMos taking place in July.
- July Novel Writing Month (JulNoWriMo): Write a novel of at least 50,000 words in July.
- The 50/90 Challenge: Write fifty songs in 90 days, usually between 4 July and 1 October.
- August Novel Writing Month (AugNoWriMo): Set your own prose writing goal for August.
- National Noir Writing Month (NaNoirWriMo): Write a 50,000 word novel of dark fiction or in the mystery genre during August.
- Three-Day Novel Contest: Write a novel in three days. Conducted on Labor Day weekend. There is an fee to enter officially and have a chance for publication because of the contest.
- September Novel Writing Month (SeptNoWriMo): Participants set their own writing or editing goal for September.
- September Writing Month: An offshoot of the original SeptNoWriMo. Participants set planning, writing or editing goals for September.
- NaNoPlanMo  : Plan your NaNo Novel for 25 hours. September 1-October 20.
- 24 Hour Comics Day: Create 24 consecutive comic book pages in 24 hours. 24 Hour Comics Day will take place on October 5, 2013.
- Gothic Novel Writing Month (GothNoWriMo): Write a novel of the gothic literature genre in October. Participants set their own word count goal.
- Science Fiction Writing Month (SciFiWriMo): A set-your-own-goal challenge for science fiction and fantasy writers.
- October Poetry Writing Month (OctPoWriMo): Write 31 poems in October.
- National Novel Writing Month: Write a novel of at least 50,000 words in November. Run by the Office of Letters and Light.
- National Playwriting Month (NaPlWriMo): Write a play of at least 75 pages in November.
- National Solo Album Month (NaSoAlMo): Write, play, and record an album of at least 29:09, though participants can set their own goals.
- The original NaNoMangO challenge.
- NaNoDrawMo: Draw 50 pieces in a month.
- 30 Characters Challenge: Design 30 new characters in 30 days.
- National Blog Posting Month (NaBloPoMo): Publish one post on your personal website or blog every day.
- National Nonfiction Writing Month (NaNonFiWriMo): Complete a work of nonfiction in 30 days.
- National eBook Writing Month (EBookWriMo): Write an eBook in 30 days.
- National Novel Finishing Month (NaNoFiMo): Write at least 30,000 words and to finish a novel in progress in December.
- International Plot Writing Month: Participants write a plot in December.
- International Story a Day Group: Participants write a story a day for the month of December.
Defunct and retired challenges
- National Novelists Exercising Month (NaNoExMo): Exercise for at least ten minutes a day in December. Appears to be defunct.
- World Poetry Writing Month: Write a poem every day in February. Appears to be defunct (site no longer exists).
- Script Frenzy: Write 100 pages of script in April. Run by the Office of Letters and Light. Retired after the 2012 event.