USABO 2027 official calendar

官方网页离线文字存档 / Official webpage text snapshot
来源：CEE · 保存日期：2026-10-13（Asia/Shanghai）
版本：2027
打开官方原网页 · 保存的原始 HTML
USABO calendar; China event dates may differ

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August 2026
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August 7
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Registration Opens
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October 2026
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October 23
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School Registration Payment Fee Deadline ($125/school).  Closes at 11:59 PM (ET).
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November 2026
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November 15
November 22
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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!
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January 2027
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January 8 to 22
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USABO Practice Exam.
Opens Monday January 8 at 12 PM (ET) Noon
Closes Friday January 22 at 6 PM (ET)
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February 2027
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February 3
February 15
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Online Open Exam (OE) at 4 PM ET
OE Scores Available in the Teacher Resource Center (TRC)
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March 2027
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March 2
March 23
March 30
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Semifinal Exam (SF) Administered at 4 PM ET
Semifinal Scores Available in the TRC
National Finalists Announced on the USABO Website
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April 2027
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April 15
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National Finalists USABO Finals Registration Opens
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May 2027
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May 1
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National Finals Registrations Close
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June 2027
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June 20 to 30
June 30
July 18-25
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National Finals Opens
National Finals  Closing Ceremony
International Biology Olympiad: Warsaw, Poland
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