Proof of our society's decline is that Halloween has become a broad daylight event for many.

The remark uses Halloween’s traditional association with night—darkness, misrule, and the uncanny—as a comic yardstick for cultural change. By calling daytime Halloween celebrations “proof” of societal decline, the speaker is less offering a literal sociological diagnosis than performing a familiar satirical move: treating a harmless shift in custom (children trick-or-treating earlier, school or community events held in daylight for safety and convenience) as emblematic of a broader loss of edge, mystery, or toughness. The humor depends on exaggeration and on nostalgia for an older, more nocturnal Halloween, implying that modern life sanitizes and schedules even the holiday devoted to the eerie.