IESOInternational Earth Science Olympiad
Competition · usually held in August · 2029
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, 2026tomorrow48h HackathonsJunctionHackathon (48 h)Nov 13–15, 2026in 2 days
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Long registration periods appear only on the days they open and close.
This month's competitions
August 2029
9 dates
No competition with a confirmed date this month.
This month, no set day · announcements and estimates
IOAAInternational Olympiad on Astronomy and Astrophysics
Competition · usually held in August · 2029
OBFEPBrazilian Public School Physics Olympiad
1st-round exam · usually held in August · 2029
OBGBrazilian Geography Olympiad
Online phases begin · usually held in August · 2029
OBQBrazilian Chemistry Olympiad
Phase III – national exam · usually held in August · 2029
ONCNational Science Olympiad
1st-round exam · usually held in August · 2029
SJWPStockholm Junior Water Prize
International final · usually held in August · 2029
TM²Girls in Mathematics Tournament (TM²)
Phase 1 Exam of the Girls in Mathematics Tournament · usually held in August · 2029
iGeoInternational Geography Olympiad
Competition · usually held in August · 2029
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.