Read the school material below. First produce a source-linked event table and separate unknowns. Deduplicate repeated notices. Use only an explicit year and time zone; ask if absent. After the table is approved, create an importable .ics file for confirmed events with stable UIDs, correct time zones, and exclusive all-day end dates. Return the file, preview table, and excluded items. Do not import or invite anyone.

MY MATERIAL AND CONSTRAINTS
Fictional school: Maple School. Year: 2026. Time zone: America/New_York. Notice A: School closed September 21–22, all day. Notice B repeats the September 21–22 closure. Notice C: Parent evening October 7, 18:00–19:00. Notice D: Photo day Friday, date to be confirmed.