An offset is simply the difference between UTC and local time, whereas the time zone is a named set of rules describing how the offset changes over time.
偏移量仅仅是UTC和本地时间之间的差值，而时区则是一个具名的规则集合，描述了偏移量该如何随着时间的变化而变化。
An offset is simply the difference between UTC and local time, whereas the time zone is a named set of rules describing how the offset changes over time.
偏移量仅仅是UTC和本地时间之间的差值，而时区则是一个具名的规则集合，描述了偏移量该如何随着时间的变化而变化。
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