Hackathon windows, 2026–27.
5 open, ranked by what closes soonest. Aug 1, 2026 → Apr 30, 2027. Free to read, no account — a Season Pass is only for filtering all of it down to what you are eligible for.
MLH member hackathons — 2026/27 season
Major League HackingHackathonOpens Aug 1Closes no fixed dateRollingcloses when it fills20 minutes per eventDozens of member events already on the season calendar. Each one has its own hacker application closing a few weeks before the event, which is the deadline people actually miss.
Eligibility High-school and college students · varies per member event, most require current enrolment
Note The season is a rolling calendar, not one window. Individual event applications close on their own dates.
Official pageChecked Aug 29Local Hack Day: Build
Major League HackingHackathonTypical windowTypically opens Oct 2026Typically closes Dec 2026Open14 weeks leftAn afternoon to apply as a leadA one-day build event you can run on your own campus. Being the lead organiser is worth more on a resume than attending three of them.
Eligibility Students at participating schools · organised by student leads
Note Typical window: Build usually runs in November or December, with organiser sign-up first. Confirm on the official page.
Official pageChecked Aug 29HackMIT — next edition
HackMITHackathonTypical windowTypically opens Jun 2027Typically closes Jul 2027Open44 weeks leftA weekend on the puzzleA puzzle-gated application that is genuinely fun to do and takes a weekend, which is why it closes two months before the event.
Eligibility College and university students worldwide, undergraduate and graduate
Note The 2026 edition closed on July 4, 2026 — this is the typical window carried forward. Confirm on the official page when it opens.
Official pageChecked Aug 29Hack the North — next edition
University of WaterlooHackathonTypical windowTypically opens Jun 2027Typically closes Aug 2027Open50 weeks leftAn afternoonCanada's largest hackathon, with travel reimbursement for accepted hackers from outside the region.
Eligibility College and university students, 18+
Note The 2026 edition closed Aug 17, 2026 and runs Sept 18 to 20, 2026. Dates shown are the typical window for the next edition.
Official pageChecked Aug 29PennApps XXVI
University of PennsylvaniaHackathonTypical windowTypically opens not publishedTypically closes not publishedNot published yetwe are watching this oneAn afternoonThe oldest college hackathon in the US, run twice a year. The autumn edition's application usually closes in August, a month before the event.
Eligibility High-school and college students globally
Note The XXVI window is not published yet. We are watching this one.
Official pageChecked Aug 29
Half of these will rule you out.
Class year, citizenship, campus endorsement. Five taps tells you which ones are actually yours, free, before you spend a weekend on the wrong application.
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