Hackaday Belgrade is one of my all time favorite Hackaday events. The energy of everyone who managed to get a ticket (it was sold out) was incredible, and the city is beautiful and fun (and never sleeps).
We're doing it again this year! The news today is the Call for Proposals which is a good way to guarantee you can get a ticket. https://hackaday.io/belgrade/2018
Also request to join the team on the project page for updates and conference chat: https://hackaday.io/project/34330-hackaday-belgrade-2018
See you in Belgrade!