AMOAmerican Math Olympiad (AMO)
American Math Olympiad Official Contest · usually held in October · 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
October 2027
15 dates
No competition with a confirmed date this month.
Next in the calendar: Bebras · World-Wide Bebras Week of computational thinking (Nov 8–12, 2027).
This month, no set day · announcements and estimates
CIIMIbero-American Interuniversity Mathematics Competition
Competition · usually held in October · 2027
ECSCEuropean Cybersecurity Challenge (ECSC) 2027
European final · usually held in October · 2027
GEMA ScratchInternational Scratch Olympiad (GEMA)
International Scratch Olympiad Project Submission · usually held in October · 2027
HacktoberfestHacktoberfest
Open source month · usually held in October · 2027
ICCInternational Cybersecurity Challenge (ICC) 2027
International final · October 2027 (days to be confirmed)
IEEEXtremeIEEEXtreme 21.0
24-hour programming contest · usually held in October · 2027
LDLudum Dare 62
Game jam (48 h compo or 72 h jam) · October 2027 (days to be confirmed)
MOSTRATECInternational Science and Technology Fair (MOSTRATEC)
International science and technology fair · usually held in October · 2027
OBMBrazilian Mathematical Olympiad
OBM exam – single phase Levels 1 to 3 / Level U Phase 2 · usually held in October · 2027
OBMEPBrazilian Public School Mathematics Olympiad
Phase 2 · usually held in October · 2027
OMIMexican Olympiad in Informatics
National stage · usually held in October · 2027
PAGMOPan-American Girls' Mathematical Olympiad
Competition · usually held in October · 2027
RoadsecRoadsec – Hacker Festival & MegaHack
Annual edition of the Roadsec festival · usually held in October · 2027
ToTTournament of Towns
Fall round · usually held in October · 2027
No date yet in 2027 (16)
CSCPTCybersecurity Challenge PT
Qualifying competition (date to be defined) · no date forecast yet · 2027
Cone SulSouthern Cone Mathematical Olympiad
Competition · no date forecast yet · 2027
EGOIEuropean Girls' Olympiad in Informatics
Competition · no date forecast yet · 2027
FGCFIRST Global Challenge 2027
World final (robotics olympics) · 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
OIIIbero-American Olympiad in Informatics
Competition · no date forecast yet · 2027
awaiting datesNo forecast
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
OutreachyOutreachy
Applications for paid internships (May cohort) · 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.