时间

时间首选项的面板分为四个标签页：

日期与时间

在左边，您可以在日历中进行日期的设置。同时也可以使用右端的上下箭头或者键盘中的光标键来进行月份和年代的修改。

类似的，您可以在右侧进行时间设置。或者直接移动时钟的指针。

时区

Simply find and choose your country in the list of continents and press Set time zone. For countries with more than one time zone you'll have to expand one level deeper.
To the right you'll find the time of the currently set time zone and the preview time of the the zone you've chosen.

Also on the right side is a setting for the hardware clock of your computer. There are two modes for the clock:

网络时间

Setting date and time manually is pretty much obsolete if you're connected to the internet. There are public servers that supply very exact time signals.

With the +/- buttons you can add/remove NTP-servers to/from the list.

The checkboxes below tell the system to Try all servers when synchronizing, not only the currently selected one, and to Synchronize at boot, so you can be sure you're clock always shows the correct time.

You can Reset to default server list if you accidentally deleted working NTP-servers and Synchronize your clock manually.

时钟

The last tab shows the options of the clock displayed in the Deskbar. You can disable the clock there completely with the top checkbox. The rest are equally self-explanatory.

In every tab is a button Revert that brings back the settings that were active when you started the Time preferences.