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About Unix time
关于 Unix 时间
A Unix timestamp is the number of seconds (or milliseconds, in JavaScript) that have elapsed since 00:00:00 UTC on January 1, 1970 — the "Unix epoch". It is timezone-independent, which is why servers, databases, and APIs use it almost universally. The 32-bit signed version will overflow on January 19, 2038; 64-bit systems are not affected.
Unix 时间戳是从 1970 年 1 月 1 日 00:00:00 UTC("Unix 纪元")起经过的秒数(或 JavaScript 中的毫秒数)。它与时区无关,这就是为什么服务器、数据库和 API 几乎都使用它。32 位有符号版本会在 2038 年 1 月 19 日溢出;64 位系统不受影响。