There's an international standard for time zone names, and these names do change once in a while. For example, the following name-abbreviation combinations in an Oracle 11.2.0.3 database are no longer in the 12c database:

时区名称有一个国际标准，这些名称偶尔会改变。例如，Oracle 11.2.0.3数据库中的以下名称-缩写组合在12c数据库中不再存在:

that don't exist in 11.2.0.3. We can tell these names are all "obscure" locations. So for people living in an area with a well-established timezone, upgrading the timezone file is indeed not needed. But if you plan to deploy a server in one of those obscure locations and decide to use their time zone, then the timezone file has to include that timezone name.

我们可以看出这些名字都是“不知名”的地点。因此，对于生活在具有完善时区的地区的人来说，确实不需要升级时区文件。但是，如果您计划将服务器部署在这些不起眼的位置之一，并决定使用它们的时区，那么时区文件必须包含该时区名称。