Notionally, the paschal full moon refers to the first ecclesiastical full moon of the northern spring used in the determination of the date of Easter. The name "paschal" is derived from "Pascha" which is a transliteration of the Greek word, which is itself a transliteration of the Hebrew pesach, both words meaning Passover. The date of Easter is determined as the first Sunday after the Paschal full moon. This full moon does not currently correspond directly to any astronomical event, but is instead the 14th day of a lunar month, determined from tables. It may differ from the date of the actual full moon by up to two days. The use of tables instead of actual observations of the full moon is useful and necessary since the full moon may occur on different dates depending where one is in the w