Spoken time values may be controlled with some very minimal keywords to determine whether to use a 12 hour or 24 hour clock for the basis of the spoken time. The following keyword values are appropriate:

• none

• 12

• 24

The none keyword inhibits time speaking, while the other two select an appropriate time pronunciation.

There is scope for more control over the way this property is used in future versions of the CSS standard.

Warnings:

• This is not yet supported by any of the browsers.