Hardcoded past Christmas timestamp makes the time gate permanently open

Description

CHRISTMAS_2023_BLOCK_TIME is a fixed constant equal to a December 2023 instant. The collectPresent time gate checks block.timestamp < CHRISTMAS_2023_BLOCK_TIME, which is permanently false now, so the intended "not callable until Christmas" restriction no longer exists.

Risk

Likelihood: Low

The timing logic itself is correct; the issue is the hardcoded constant has already elapsed. Whether this matters depends on intent, but the effect is that the gate is now unconditionally satisfied.

Impact: Low

The time-lock provides no protection on any current deployment, so present collection is always open regardless of date. If the design depended on holding collection until a future event, that control is absent.

Proof of Concept

Collection succeeds at the current block time with no warp into the future.

Recommended Mitigation

Use a configurable or clearly future date, or document that the gate is intentionally inert.