Christmas dates depend on the calendar
Кентерберійський собор як західний церковний контекст; фото не визначає календар усіх православних / Canterbury Cathedral as Western church context; this photograph does not determine all Orthodox calendars. Credit: ECetc Church Photos; CC BY-SA 4.0. https://creativecommons.org/licenses/by-sa/4.0 Source: https://commons.wikimedia.org/wiki/File:Canterbury_Cathedral%2C_Kent_(exterior).jpg
The division of all Western Christians celebrating December 25 and all Eastern Christians January 7 is incorrect. Some Orthodox churches use a fixed-feast calendar placing Christmas on civil December 25, including the OCU’s Revised Julian calendar. For communities retaining the Julian calendar, December 25 currently corresponds to Gregorian January 7. Denomination and calendar are not the same thing.
