IM²CInternational Mathematical Modeling Challenge
Contest window (each team picks 5 consecutive days) · Feb 1 – Apr 26, 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
March 2027
11 dates
FEBRACEBrazilian Science and Engineering Fair (FEBRACE)
In-person finalists' fair and awards (March 19) · Mar 15–19, 2027
This month, no set day · announcements and estimates
APMOAsian Pacific Mathematics Olympiad
Exam (held in each participating country) · usually held in March · 2027
CanguruKangaroo Math Brazil
Exam · usually held in March · 2027
German MathInternational German Math Olympiad
International German Math Olympiad Final Exam · usually held in March · 2027
Hi-LinguaHi-Lingua Language Competition
Hi-Lingua Language Competition Finals · usually held in March · 2027
OBABrazilian Astronomy and Astronautics Olympiad
TSA – Astronomy Selection Tournament (announced for early March; day to be announced; invitees only) · no date forecast yet · 2027
OBBBrazilian Biology Olympiad
Phase 1 · usually held in March · 2027
OBFEPBrazilian Public School Physics Olympiad
School accreditation opens · usually held in March · 2027
OBRACBrazilian Cartography Olympiad
Registration (biennial olympiad, no 2026 edition) · usually held in March · 2027
ToTTournament of Towns
Spring round (A level) · usually held in March · 2027
No date yet in 2027 (11)
Cone SulSouthern Cone Mathematical Olympiad
Competition · no date forecast yet · 2027
IESOInternational Earth Science Olympiad
Competition · no date forecast yet · 2027
IJSOInternational Junior Science Olympiad
Competition · no date forecast yet · 2027
IOAAInternational Olympiad on Astronomy and Astrophysics
Competition · no date forecast yet · 2027
OIABIbero-American Biology Olympiad
Competition · no date forecast yet · 2027
OIAQIbero-American Chemistry Olympiad
Competition · no date forecast yet · 2027
OIMIbero-American Mathematical Olympiad
Competition · no date forecast yet · 2027
OIbFIbero-American Physics Olympiad
Competition · no date forecast yet · 2027
awaiting datesNo forecast
OLAALatin American Astronomy and Astronautics Olympiad
Competition · no date forecast yet · 2027
OMCPLPMathematical Olympiad of the Community of Portuguese-Speaking Countries
Competition · no date forecast yet · 2027
RMMRomanian Master of Mathematics
Competition · no date forecast yet · 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.