Instead of forward-planning a day from breakfast onward, you tell the app the fixed events — the 3 PM flight, the 7 PM dinner — and it works backward to surface when you actually need to start packing, leave the house, or stop work. The interface uses natural language and relative times (“two hours before the flight”) rather than the calendar’s full date-and-time fields, which is the right shape for the actual mental task. Genuinely novel approach to a problem most calendars ignore.