Competition schedule

Find the 2027 registration deadline and both exam dates, with US Eastern and Beijing times side by side.

Key dates for 2027

2027 · USAEBO

US Eastern time first, Beijing time second. Check the date in both locations.

  1. Round 1 registration closes

    Open entry to Round 1
    US Eastern · EST (UTC−5)
    Beijing · UTC+8
    Online registration

    Complete registration, electronic declarations and payment.

  2. Round 1 exam

    Open entry · Individual
    US Eastern · EST (UTC−5)
    –
    Beijing · UTC+8
    –
    40 multiple-choice questions · 60 minutes

    Online, with technology-based proctoring.

  3. Round 2 exam

    Round 1 qualifiers only
    US Eastern · EDT (UTC−4)
    –
    Beijing · UTC+8
    –
    Open responses with reasoning · 120 minutes

    Online, with technology-based proctoring.

Time zones and next-day dates

Both rounds start at 20:00 US Eastern, on the following morning in Beijing. Round 2 uses daylight time, so its Beijing start is one hour earlier.

Round 1EST · UTC−5
US Eastern
+13 hours
Beijing · Next day
Round 2EDT · UTC−4
US Eastern
+12 hours
Beijing · Next day
Beijing stays on UTC+8. When setting a calendar reminder or alarm, verify both the date and the time zone.

Prepare in three phases

Use this sequence to plan your preparation. Follow 2027 notices for check-in, software, proctoring and submission requirements; 2026 handbooks provide background only.

  1. Before registration closes

    • Check eligibility and prepare a personal non-school email, a school email and school details.
    • The student and a parent or guardian complete their electronic signatures. After payment, save the registration confirmation and transaction record.

  2. Before Round 1

    • Confirm portal access and email delivery. Read current-season requirements for devices, connectivity, technology-based proctoring and permitted materials.
    • Check your exam setting, connection and equipment in advance. Practice pacing for 40 questions in 60 minutes.

  3. After qualifying for Round 2

    • Check your qualification notice and confirm Round 2 proctoring and submission arrangements.
    • Practice open responses and show your reasoning in clear steps.