Edition commemorating 2025's "Five-Squared Cinco de Mayo" – 5.5.25 – when it was both Cinco de Mayo and a perfect-square date (5² = 25) in a perfect-square year (2025 = 45²).
The next (perfect-square)² Cinco de Mayo won't be until 3025, which is 55 * 55 (and that's really quite a lot of fives!!!!!).
QED.