{"id":"leap-day-count-uses-y-minus-1","text":"`_days_from_epoch` counts leap days for completed years `1..(y-1)`, not `1..y`, because the current year's leap day is handled separately via the `month > 2` correction","truth_value":"IN","source":"entries/2026/06/06/number-of-days-between-two-dates-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"leap-day-count-uses-y-minus-1","truth_value":"IN","reason":"premise"}]}}