Why doesn't Easter fall on the same date every year?

Answer: It follows a spring moon-and-Sunday rule

It follows a spring moon-and-Sunday rule ✓ — Correct! In Western Christianity, Easter is set as the first Sunday after the first full moon on or after the spring equinox, so its date moves each year.

It is fixed to April's first Sunday — Wrong. Easter is not simply April's first Sunday; it can fall from late March to late April.

Church leaders pick a new date each year — Wrong. Easter follows a rule-based calculation, not a new annual choice by church leaders.