Dlaczego prawosławni świętowali Wielkanoc tydzień później?
Why did Orthodox believers celebrate Easter a week later?

Summary/Abstract: The article is devoted to the topic of Easter and the traditions of its celebration. It begins with a presentation of the history of the Christian Passover creation and its relationship to the Jewish Passover. The following sub-topics of the article present in turn the traditions of the date of the feast and the complications associated with the attempt to unify it, as well as historical decisions on the unification of the rules for its calculation. The last sub-topic concerns practices present in various Christian Churches.

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