August 2026 | |
August 7 | Registration Opens |
October 2026 | |
October 23 | School Registration Payment Fee Deadline ($125/school). Closes at 11:59 PM (ET). |
November 2026 | |
November 15
November 22 | School Registration Closes at 11:59 PM (ET). No registrations will be accepted after this date and time! Student Registration Closes at 11:59 PM (ET) No registrations will be accepted after this date and time! |
January 2027 | |
January 8 to 22 | USABO Practice Exam. Opens Monday January 8 at 12 PM (ET) Noon Closes Friday January 22 at 6 PM (ET) |
February 2027 | |
February 3 February 15 | Online Open Exam (OE) at 4 PM ET OE Scores Available in the Teacher Resource Center (TRC) |
March 2027 | |
March 2 March 23 March 30 | Semifinal Exam (SF) Administered at 4 PM ET Semifinal Scores Available in the TRC National Finalists Announced on the USABO Website |
April 2027 | |
April 15 | National Finalists USABO Finals Registration Opens |
May 2027 | |
May 1 | National Finals Registrations Close |
June 2027 | |
June 20 to 30 June 30 July 18-25 | National Finals Opens National Finals Closing Ceremony International Biology Olympiad: Warsaw, Poland |
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