Open Source Lisbon is the biggest open source event in Portugal. This year’s event will be the 19th edition and will take place over the course of two days. The first day will be dedicated to the Public Sector and European Union subjects, while the second will examine the Open Source Mindset in a Shifting World.

What is Open Source Lisbon?
Open Source Lisbon is a two-day event for business professionals, technology enthusiasts and all individuals with an interest in everything related to open source software. It is the largest open source event in Portugal, taking place on an annual basis. Due to the ongoing COVID-19 public health crisis, this year’s edition will be held online over the course of two days to celebrate the Portuguese Presidency of the Council of the European Union and the European Commission’s Open source software strategy 2020-2023. The event will examine Europe's vision to be a leader in adopting open technologies, facilitate open source discussions, and present how technology can improve citizens’ quality of life.
Online registration is compulsory and free of charge.
References
https://www.opensourcelisbon.com/
https://ec.europa.eu/info/departments/informatics/open-source-software-strategy_en