网摘:Ubuntu的时区

电脑时区选择中没有北京的问题

摘自Blog on 27th Floor

安装Linux的时候要选时区,在下拉列表中就会发现,里面没有北京,却有上海和重庆,还有乌鲁木齐。为什么呢?这个问题一直没有得到解答。日前有空,上网搜了一番,基本有了答案。…………原来在1949年以前,天朝一共有5个时区,分别以这5个城市为代表,分别是:长白时区GMT+8:30、中原标准时区GMT+8、陇蜀时区GMT+7、新藏时区GMT+6和昆仑时区GMT+5:30。这是1912年北京观象台制订,并在后来由内政部批准过的。…………

长知识不是?原来中国的时区有5个,后来才变成了一个。那么,问题是:时区数据就不更新了?这玩意儿和时间标准时间一样有机构管理吗?

恩,英文wiki说:

Nevertheless, most major countries had adopted hourly time zones by 1929. Today, all nations use standard time zones for secular purposes, but they do not all apply the concept as originally conceived. Newfoundland, India, Iran, Afghanistan, Venezuela, Burma, the Marquesas, as well as parts of Australia use half-hour deviations from standard time, and some nations, such as Nepal, and some provinces, such as the Chatham Islands, use quarter-hour deviations. Some countries, most notably China, use a single time zone, even though the extent of their territory far exceeds 15° of longitude. Before 1949 China used five time zones (see Time in China).

附图:
国家时区使用分布

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s