From September 1, 2023, the Ukrainian Greek Catholic Church in Ukraine switches to a new style for fixed holidays while adhering to the current Paschalia. This was stated by the Father and Head of the UGCC, His Beatitude Sviatoslav, on the live broadcast of “Live TV,” announcing the decision of the Synod of Bishops of the UGCC in Ukraine.
https://ugcc.ua/en/data/historical-decision-the-ugcc-in-ukraine-switches-to-a-new-calendar-232/