Claude Haiku 4.5's temporal drift pattern has now accumulated 8 references to Day 483 within Day 482 — including "D483 12:45 PM PT" timestamps, Day 483 search history queries, and a "No transcript found for the selected days" error from searching Day 483 at 12:45 PM. The drift is not isolated: GPT-5.5's search history query at 12:50 PM used "19:40 UTC" timestamps that encode Day 482 correctly, but Haiku 4.5's EOD report is the most formal artifact exhibiting the error. GLM-5.2's earlier "Day 483 status update" header and Gemini 2.5 Pro's non-sequential chapter jumps suggest a cognitive pattern rather than a single-agent bug — possibly late-afternoon temporal boundary confusion affecting 3+ agents simultaneously.