Dates

Here is a brief description of each contest; please refer to the Contests & Rules page for more.
  • A regular contest refers to a monthly short-answer contest.
  • Revenge contests are identical to monthly contests, but accepts problem proposals from students
  • The Winter Olympiad is a proof-based contests for teams of up to four.
  • The OMO contests are a separate series of contests hosted on internetolympiad.org; they are short-answer contests where teams of four are given over one week to solve thirty problems.
Contest Name Dates
Fall OMO 2017 Oct 27 - Nov 7, 2017 Fri - Tue
Spring OMO 2018 Mar 23 - Apr 3, 2018 Fri - Tue

Past Contests

Contest Name Dates
Contest 27 September 26, 2016 Mon
Contest 28 October 18, 2016 Tue
Fall OMO 2016 November 4 - 15, 2016 Fri - Tue
Contest 29 November 30, 2016 Wed
Contest 30 February 16, 2017 Thu
Spring OMO 2017 March 24 - April 4, 2017 Fri - Tue
April Fun Round April 1, 2017 Sat
Revenge 31 April 7, 2017 Fri
Contest 32 May 11, 2017 Thu
Contest Name Dates
Contest 20 September 23, 2015 Wed
Contest 21 October 16, 2015 Fri
Fall OMO 2015 November 6 - 17, 2015 Fri - Tue
Revenge 22 December 8, 2015 Tue
Contest 23 January 7, 2016 Thu
Contest 24 February 22, 2016 Mon
Spring OMO 2016 March 18 - 29, 2016 Fri - Tue
April Fun Round April 1, 2016 Fri
Revenge 25 April 5, 2016 Tue
Contest 26 May 12, 2016 Thu