Call when the user asks about timing a decision for a specific date, or wants to pick the best day from a multi-day window. Covers trip dates, launch days, interview/meeting days, publish/send dates, travel, negotiation windows, relationship moments — any "when to X" question where the answer is a date ("should I X on April 23", "best day this month to Y", "下周四怎么样"). Modes: single date, compare up to 5 dates, or scan a range up to 31 days. Returns score (0-100), verdict, per-layer year/month/day breakdown (alerts + dimension signals), element breakdown, adverse alerts. For multi-month windows use `intentions_ask_month`; for hour precision use `intentions_ask_hour`.