OBAFOGBrazilian Rocket Olympiad (formerly MOBFOG)
Rocket Days (16 groups; invited teams only) · Aug 3 – Dec 17, 2026
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
October 2026
14 dates
OBMBrazilian Mathematical Olympiad
Announcement of selected students and participation confirmation (invitees only) · Sep 7 – Oct 2, 2026
OBFBrazilian Physics Olympiad
Announcement of Phase 3 qualifiers · Oct 7, 2026
OBMBrazilian Mathematical Olympiad
48th OBM – single phase (Levels 1, 2 and 3) and University Level Phase 2 (Level 1 on day 1 only) · Oct 8–9, 2026
OBFBrazilian Physics Olympiad
Phase 3 fee payment (qualified students) · Oct 9 – Nov 5, 2026
ONCNational Science Olympiad
Phase 2 preliminary results · Oct 15, 2026
TM²Girls in Mathematics Tournament (TM²)
Phase 2 Exam of the Girls in Mathematics Tournament · Oct 16, 2026
OBMEPBrazilian Public School Mathematics Olympiad
Phase 2 (Saturday, 14h30, Brasília time) · Oct 17, 2026
OBLBrazilian Linguistics Olympiad
Andrei Zalizniak Tournament – individual registration deadline · Oct 21, 2026
OBLBrazilian Linguistics Olympiad
Andrei Zalizniak Tournament (online exam, 14h–18h; 9th grade and high school) · Oct 23, 2026
ONCNational Science Olympiad
Final results · Oct 23, 2026
OBSUSBrazilian Sustainability Olympiad
Announcement of results and awards ceremony · Oct 24, 2026
OBABrazilian Astronomy and Astronautics Olympiad
Phase 2 – International pre-selection, exam 2 (pre-selected students only) · Oct 30, 2026
OBFEPBrazilian Public School Physics Olympiad
Phase 2 (Saturday, 13h–17h30, local time) · Oct 31, 2026
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.