None.

An array of strings representing all hour cycle types commonly used for the Locale, sorted in descending preference. If the Locale already has an hourCycle, then the returned array contains that single value.

Below is a list of supported hour cycle types.

h12

Hour system using 1–12; corresponds to 'h' in patterns. The 12 hour clock, with midnight starting at 12:00 am. As used, for example, in the United States.

h23

Hour system using 0–23; corresponds to 'H' in patterns. The 24 hour clock, with midnight starting at 0:00.

h11

Hour system using 0–11; corresponds to 'K' in patterns. The 12 hour clock, with midnight starting at 0:00 am. Mostly used in Japan.

h24

Hour system using 1–24; corresponds to 'k' in pattern. The 24 hour clock, with midnight starting at 24:00. Not used anywhere.

If the Locale object doesn't have a hourCycle already, getHourCycles() lists all commonly-used collation types for the given Locale. For examples of explicitly setting a hourCycle, see hourCycle examples.

const arEG = new Intl.Locale("ar-EG");
console.log(arEG.getHourCycles()); // ["h12"]

const jaJP = new Intl.Locale("ja-JP");
console.log(jaJP.getHourCycles()); // ["h23"]

• Intl.Locale
• Intl.Locale.prototype.hourCycle
• Unicode Hour Cycle Identifier in the Unicode locale data markup language spec