The dates for season 2026-2027 have just been put up on the UEFA website, Thursday 6th August 2026.
UEFA Regulations Article 48. Excerpts from the regulations:
2. The two and a half hours period (or periods) must be decided on by the member association fourteen days, at the latest, before the beginning of its domestic season, at which time they will enter into force and apply for the whole season.
5. . . . . Member associations wishing to protect domestic football in accordance with Article 3(1) above must provide UEFA at least fourteen days before the beginning of the domestic football season with a copy of the complete relevant domestic fixture list(s) (in English, German or French containing without limitation kick-off times for each match) which justify(ies) the selected "blocked hours". The information provided to UEFA must also specify the beginning and the end of the domestic football season, including any interruptions to the fixture schedule, such as `winter-breaks`.
If member associations do not comply with this time limit, no restrictions will apply to the Transmission of football during that season for the member association in question.