How to define which is (24/12) hour format on device?

如何定义为（24／12）小时格式的设备？

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There's no need to login or create and account. Simply enter a topic and the date and time - in 24 hour format.

该服务上手很快，无需注册和登录，只要输入提醒信息、日期和时间（24小时格式）就行了。

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Listing 7 demonstrates code to get a new instance of the Calendar class, obtain the hour of the day (which is returned in a 24-hour format), and then put together a simple greeting based on that hour.

清单7给出了获得calendar类新实例的代码，从而得到一天中的具体时间(以24小时的格式返回)，然后根据这个时间组合出一条简单的欢迎词。

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Asked why there had never been a Blackadder feature film, Atkinson said it was "surprisingly tricky" to expand the sitcom format to an hour and a half.

BBC: Rowan Atkinson plans stage return

The format of 24-hour broadcast news is generally similar across the board, Monck said, and aside from the fact that it's headquartered in the Middle East, Al Jazeera will probably not be noticeably different from its competitors.

FORBES: Al Jazeera In English

It also wants to change the format of the consultation to include two-hour public meetings in every borough during the 12-week consultation process.

BBC: London Fire Authority agrees to allow cuts consultation