OBABrazilian Astronomy and Astronautics Olympiad
Announcement of medalists · usually held in June · 2027
2026–2030 calendar
Competition calendar
Tech competitions highlighted (⚡), science olympiads, hackathons and more. Filter by age and click an event for details.
⚡ Upcoming tech dates
48h HackathonsMLH GHWOnline hackathon weekNov 6–12, 2026happening now</> ProgrammingBebrasWorld-Wide Bebras Week of computational thinkingNov 9–13, 2026happening now🔐 CybersecurityCSAWCSAW Cybersecurity Games Global FinalsNov 12–14, 2026in 2 days48h HackathonsJunctionHackathon (48 h)Nov 13–15, 2026in 3 days
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Long registration periods appear only on the days they open and close.
This month's competitions
June 2027
8 dates
No competition with a confirmed date this month.
This month, no set day · announcements and estimates
OBFBrazilian Physics Olympiad
Phase 1 · usually held in June · 2027
OBIBrazilian Olympiad in Informatics
Phase 1 (Local) – Programming category · usually held in June · 2027
OBLBrazilian Linguistics Olympiad
Phase 2 (month announced by OBL; day to be announced) · no date forecast yet · 2027
OBMEPBrazilian Public School Mathematics Olympiad
Phase 1 · usually held in June · 2027
OBQBrazilian Chemistry Olympiad
Online state qualifiers – exam · usually held in June · 2027
OBQJrBrazilian Junior Chemistry Olympiad
Phase 1 exam · usually held in June · 2027
OBRBrazilian Robotics Olympiad
Theoretical category – Phase 1 · usually held in June · 2027
Confirmed: official days · Month announced: days to be confirmed · Estimate: the month it is usually held, not announced yet · No forecast: date unknown.
Dates checked on the organizers' official websites and calendars (last review on November 6, 2026). They may change: always confirm on the official website before registering or traveling.