OBSMABrazilian Health and Environment Olympiad
Project submissions – 13th edition (2025-2026), extended · Aug 18 – Jul 20, 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
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1
2
3
4
5
6
7
8
9
10
11
12
14
15
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
2
Long registration periods appear only on the days they open and close.
This month's competitions
March 2026
6 dates
CanguruKangaroo Math Brazil
Registration (done by schools) · Dec 1 – Mar 13, 2026
OBMEPBrazilian Public School Mathematics Olympiad
Registration (done by schools) · Feb 4 – Mar 16, 2026
OBABrazilian Astronomy and Astronautics Olympiad
Student registration (single OBA/OBAFOG registration) · Feb 23 – May 1, 2026
OBAFOGBrazilian Rocket Olympiad (formerly MOBFOG)
Registration (single OBA/OBAFOG registration) · Feb 23 – May 1, 2026
CanguruKangaroo Math Brazil
Exam (official date 19/03; alternative dates 20 to 25/03) · Mar 19–25, 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.