When someone asks for "the best" datetime format, they're really asking which circle of hell they want to live in. RFC 2822 gives you that vintage email header vibe with its verbose Saturday nonsense. ISO-8601 is the golden child—structured, sortable, and what your database actually wants to see. But Unix time? Just a cold, hard integer counting seconds since 1970. No timezones, no formatting drama, no parsing headaches. It's like choosing between a fancy sports car, a reliable sedan, and a skateboard that somehow gets you there faster than both. The skateboard wins every time when you're doing calculations, comparisons, or literally anything that doesn't involve showing dates to humans. Store it as Unix time, display it as ISO-8601, and never speak of RFC 2822 again unless you're debugging ancient email systems. Fun fact: Unix time will overflow 32-bit signed integers on January 19, 2038. Mark your calendars—or don't, because hopefully we'll all be using 64-bit by then.