A hashtag#hackathon (also known as a hack day, hackfest or codefest) is a design sprint-like event in which computer programmers and others involved in software development, it is usually a day-long (can be 36 hours, 48 hours, etc.) coding competition where software programmers, developers, designers, etc. come together to build and design something cool.
Find the upcoming hackathons at your country https://www.hackathon.com/ hashtag