Paul makes the Resurrection load-bearing: if Christ is not raised the preaching is empty. Good Friday is inseparable — one Triduum, one day — but the tradition named the feast after the rising, not the dying.

The headline claim and the inversion the scholarship keeps warning about. Augustine's distinction in Letter 55 is that the Nativity is commemorative while Pascha is sacramental, a transitus the believer actually enters. Cultural weight runs the other way, which is the problem and not the evidence.

Widest gap in the scope. One is the event the faith stands or falls on; the other is a devotional feast of the mode of presence at that event's memorial.

The event that grounds the doctrine outranks the day set aside to state the doctrine.