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For leadersNov 2026

First announcement sent to members

Dates, eligibility, fees for guest teams and the registration timeline.

The first announcement for JBMO 2027 has been sent to all MASSEE member countries. It confirms the dates of the competition, the eligibility rules and the timeline for registering teams.

Key dates

Eligibility

Contestants must be no older than 15.5 years on the day of the competition and must not have started upper secondary education. Each team has up to six students, a leader and a deputy leader.

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Identity19 Oct 2026 · 3 min read

A sun over the black mountain: meet the JBMO 2027 logo

The mark puts Montenegro's peaks inside the M and the rising sun above it. Here is how it was made and how it will appear on medals, diplomas and the site.

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For leadersJan 2027

Call for problem proposals is open

Proposals use the official template and must include full solutions. Deadline 31 March.

Get the template →
For leadersFeb 2027

Delegation portal: how to register your team

Country codes go out by email. A step-by-step guide to the registration form.

Read the guide →