CSS Day 2026

about this room

Two days dedicated to the cutting edge of CSS and front-end craft, held in the 17th-century Zuiderkerk in the heart of Amsterdam. CSS Day is where browser engineers, spec authors and the best front-end developers in Europe gather to go deep on what's newly possible on the web — layout, typography, colour, animation and the features landing in browsers right now. A must for designers and engineers who build for the web and want to stay genuinely ahead, in one of the most atmospheric conference venues in the city.