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Starting September 1, 2023, the Synod of Bishops of the Ukrainian Greek Catholic Church will eliminate the error of the old Julian calendar and church holidays will correspond to the astronomical calendar that our society lives by. For the past 123 years, we have been living according to a calendar that lagged behind the astronomical calendar by 13 days.
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Mykhailo Dobrovolslyi (2024) studied this question.
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