Join your local tech community & 200+ other communities around the world for a global 12-hour hackathon & celebration of learning, building, & sharing!

What is MLH Local Hack Day: Build?

At Local Hack Day: Build your community will get first-hand experience bringing their ideas to life by participating in a hackathon. Over the course of 12 hours, attendees will use hardware and software to build everything from websites to robots to mobile apps and more.

This is an event for all skill levels, from beginner to the most veteran developers. Workshop attendees learn skills that they can apply in their projects, schoolwork, job, and beyond.

Where is MLH Local Hack Day: Build?

There are over 300 Local Hack Day locations around the world that you can participate in. To attend, find the location's page on the Local Hack Day website and register. 

If there isn't a location near you, you can always particiate virtually or host your own!

What is a hackathon?

Hackathons are learning focused invention marathons where participants dream up fun, interesting projects and work in small teams to bring them to life over the course of the event.

When you're not working on your project, there are plenty of other things to do like attending educational workshops, making friends, or showing off what you're learning or building.

View full rules


Major League Hacking

Major League Hacking

Judging Criteria

  • Learn, Build, and Share!
    Local Hack Day is about learning, building, and sharing with your community. This Devpost page is just to show off all the amazing projects everyone creates.


  • Social Good