… stipulates that the transition period will end on Dec. 31, 2020 unless the UK requests and the EU grants, by July 1, 2020, an extension to Dec. 31, 2021 or Dec. 31, 2022. That provision was agreed because both … implementation period.” The text defines the “completion day” of the implementation period as Dec. 31, 2020 at 11 p.m. …