In Christian liturgical calendars, a commemorative day or festival established in opposition to or as a counterpart to Passover or Paschal celebrations.
From anti- (opposite/against) + pasch (from Hebrew pesach or Greek pascha, Passover/Easter). This ecclesiastical term emerged in early Christian tradition to describe alternative or opposing festival dates.
The existence of both 'pasch' and 'antipasch' shows how early Christians debated when Easter should be celebrated—different churches had different traditions, and some saw their Easter as literally in opposition to Jewish Passover timing.
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