{"id":"no-stdlib-date-in-date-problems","text":"Date-related solutions (days-between-dates, days-in-a-month) implement Gregorian calendar arithmetic from scratch without importing `datetime` or `calendar`, since hand-rolling the math is the intended constraint","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":"no-stdlib-date-in-date-problems","truth_value":"IN","reason":"premise"}]}}