Hacktoberfest 2026 opens October 1 with a new format: pull requests no longer count toward swag, the theme is open AI, and 300+ local fests are on the map. Here is how the month actually works this year.

October is open-source month, and Hacktoberfest 2026 is live as of today. This year's theme is "AI belongs to everyone," centered on building with open-weight models and open-source AI. The event is managed by MLH and DEV in partnership with DigitalOcean, and it runs the whole month — 300+ in-person Fests in cities around the world, plus an online program of livestreams and weekly challenges.

But if your plan was to grind out pull requests for a t-shirt, read the new FAQ first: pull requests and merge requests no longer count toward Hacktoberfest rewards. That is the headline change, and it's worth understanding before October's muscle memory kicks in.

Why the PR counter died

The organizers are blunt about it: low-effort spam PRs have become trivially easy to generate, so they're "listening to maintainer feedback and no longer actively incentivizing PRs." If you've maintained a project during any previous October, you know exactly the flood they mean — drive-by "fixes" that add a comma, reformat a file, or bump a dependency nobody asked about, each demanding review time from someone volunteering it.

This is a rare case of an event choosing its maintainers over its metrics. October used to train thousands of developers that open source is a vending machine: insert PRs, receive shirt. The 2026 format admits the machine was broken and redesigns the month around learning and building together instead.

How to actually take part

The new loop is simple — sign in, show up, collect stickers:

  1. Sign in with MyMLH. It's free and takes a minute; adding your address gets you your first two stickers. The participant dashboard opens by October 1 and shows the activities and requirements for earning your sticker pack. Connecting your DEV account is optional but recommended — it earns you a special DEV badge and credit for the DEV Challenges.

  2. Go to a Fest, or join online. Find a local Fest and register on its event page (each Fest registers separately), or take part from anywhere: MLH livestreams covering open-weight models, agents, and tools let you check in with an on-screen code to collect a sticker, and a new DEV mini-hackathon launches every week of October. There's also Global Hack Week: Hacktoberfest, a one-week hacker festival of sessions and challenges.

  3. Collect the swag. Three virtual stickers earns a real sticker pack mailed to your door; keep going to unlock more. Fests carry t-shirts and other swag in limited quantities — check with your local host about what's available and how to claim it.

The part that hasn't changed

Here's what the FAQ is careful to say: PRs not counting toward rewards is not PRs being discouraged. "We certainly still encourage you to work on open source and share your work with the world during Hacktoberfest." The new format just stops paying bounties for volume.

Which makes this, quietly, the best year to do October right. If you're going to contribute code anyway, do it the way that survives review in any month: read the project's CONTRIBUTING guide first, pick an issue in a project you actually use, keep the change small and focused, and respond to review feedback instead of arguing with it. Documentation fixes and real bug reports are legitimate contributions — they always were. The shirt was never the point; the 2026 format just stopped pretending otherwise.

Sources: Hacktoberfest 2026 — official site