Ubucon is the anual event of the ubuntu community, yes, the free as in freedom operating system!
And this time they will have it right next to Lisbon, in Sintra and a few of the talks will be about privacy. Take a look at the event if you’re interested. The entrance is free, but don’t forget to register.
https://manage.ubucon.org/eu2019/talk/ZHUW99/
https://manage.ubucon.org/eu2019/talk/BVCA3C/
All of the schedule is available here.
And you can register here.