Septemberist or Septemberism may refer to: Septembrism or Setembrismo, a Portuguese political movement in the 1830s Dimitrovist Pioneer Organization "Septemberists", part of the Bulgarian pioneer movement Septemberists, insurgents involved in the September Uprising in Bulgaria in 1923 "Septemberism", a 2010 song by Man Overboard from Real Talk
See also Decemberist Octoberist Septemvriytsi (disambiguation)