I was hoping this article would cover non-obvious date time quirks when conveying this to humans. If the context is an event, what does midnight mean? A one-da

I was hoping this article would cover non-obvious date time quirks when conveying this to humans. If the context is an event, what does midnight mean? A one-day event might start at 6pm but not end until 2 or 3am. A computer considers that a two-day event, but that's kind of intuitively wrong. To a human, it's only a 1 day, and it doesn't end tomorrow. It ends, late tonight. What if it starts Saturday at 9pm and goes until 6am? You would still consider that a Saturday event, but ends at sunrise, or early morning.