Creating a ColdFusion Calendar That Doesn’t Lie About Time

9:00 AM sounds simple until someone asks, “In which time zone?” Explore why timestamps, local times, UTC offsets, and daylight saving rules are not interchangeable, and why treating them that way can make schedules drift, events move, and otherwise sensible code behave like it has a grudge.

Moving one Thursday practice to Friday should be easy. Unless Thursday doesn't actually exist as a database row. See how a ColdFusion calendar handles single-event edits, series splits, cancellations, and the kind of foreign-key bug that makes a passing test suite look downright suspicious.