The Day of Atonement is not about Satan, but about the complete cleansing from sins through Christ. The Passover is not a sin offering, but a peace offering.
The timing of Christ's crucifixion does not coincide with the Passover, but instead lines up with the covenant God made with Abraham, marking a major fulfillment.
The wavesheaf offering is reckoned from the weekly Sabbath within the Days of Unleavened Bread. It had specific requirements that were not met in Joshua 5.
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