Complex sentence: Hardware Freedom Day is an annual celebration organized by the Digital Freedom Foundation from 2013 to 2015, with the goal of upholding the spirit of open hardware and make more people aware of using and contributing to free and hardware projects.
Split into simpler sentences: Hardware Freedom Day is an annual celebration organized by the Digital Freedom Foundation. The goal of Hardware Freedom Day is to celebrate the spirit of open hardware and make more people aware of using and contributing to free and hardware projects.