Upvote:4
The proposed directive has not yet been fully adopted yet. The text proposed by the EU Commission was substantially modified by the EU Parliament in March 2019, so it's probably back to the EU Commission and the EU Council for more changes.
One of the main changes was the move of the last year for "seasonal time changes" as they call it from 2019 to 2021.
With a bit of time to go back and forth between the EU Commission, EU Council and EU Parliament, it'll probably take a few more months to be adopted.
Also, being a (proposed) directive and not a regulation, it needs to be transposed in national legislation, which will again take (at least) a few more months. And since a lot of people need to know such changes well in advance, the first "missing" change won't happen for months after each of the 27 member countries have adopted their relevant national legislation.
It's not impossible the last year of summer time won't happen until 2022 or later. I don't think we will have a clear picture of what countries pick summer or winter time for quite a while.
Upvote:4
While the European Commission voted to abandon Daylight Savings Time, this must be approved by Council of European Union and the European Parliament according to Wikipedia. Therefore it is not a done deal. This might mean the exact terms and deadlines might be altered before final approval but in its current form, the change would happen in 2021 either in the spring or fall depending on which state stays in summer time and which one in winter time. These have until April 2020 to decide, so it will be a few more months before this question can fully be answered.