Choosing a good date for your Hackathon can have a significant influence on how well it is attended and how much impact it has. Hackathons take concentrated effort over at least one day, so community Hackathons are typically held on weekends when most people are not working. Make sure you choose a date far enough in advance to allow yourself time to promote it to attendees.
In addition, we recommend that if possible, you avoid the following when choosing your date:
politically significant dates, such as elections, especially if you are organizing a government open data Hackathon
summer months if possible (it can be challenging to gather together attendees, especially in smaller cities.)
weekends with events already scheduled that will compete with your event for attendees (other Hackathons, ChangeCamps, conferences)