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===Time of day=== | ===Time of day=== | ||
Context determines whether the [[12-hour clock|12-]] or [[24-hour clock|24-hour]] clock is used; in both, colons separate hours, minutes and seconds (e.g. {{xt|1:38:09 | Context determines whether the [[Wikipedia:12-hour clock|12-]] or [[Wikipedia:24-hour clock|24-hour]] clock is used; in both, colons separate hours, minutes and seconds (e.g. {{xt|1:38:09 pm}} or {{xt|13:38:09}}). | ||
* '''12-hour clock times''' end with dotted or undotted lower-case | * '''12-hour clock times''' end with dotted or undotted lower-case '''a.m.''' or '''p.m.''', or '''xtn|am''' or '''pm''', preceded by a [[#Non-breaking spaces|non-breaking space]], e.g. {{xt|2:30 p.m.}} or {{xt|2:30 pm}} (markup: <code>2:30&nbsp;p.m.</code> or <code>2:30&nbsp;pm</code>), not {{!xt|2:30p.m.}} or {{!xt|2:30pm}}. Hours should not have a leading zero (e.g. {{xt|2:30 p.m.}}, not {{!xt|02:30 p.m.}}). Usually, use {{xt|noon}} and {{xt|midnight}} rather than {{!xt|12 pm}} and {{!xt|12 am}}; whether "midnight" refers to the start or the end of a date should be explicitly specified unless clear from the context. | ||
* '''24-hour clock times''' have no a.m., p.m., noon or midnight suffix. Hours under 10 should have a leading zero (e.g. {{xt|08:15}}). The time {{xt|00:00}} refers to midnight at the start of a date, {{xt|12:00}} to noon, and {{xt|24:00}} to midnight at the end of a date, but {{!xt|24}} should not be used for the first hour of the next day (e.g. use {{xt|00:10}} for ten minutes after midnight, not {{!xt|24:10}}). | * '''24-hour clock times''' have no a.m., p.m., noon or midnight suffix. Hours under 10 should have a leading zero (e.g. {{xt|08:15}}). The time {{xt|00:00}} refers to midnight at the start of a date, {{xt|12:00}} to noon, and {{xt|24:00}} to midnight at the end of a date, but {{!xt|24}} should not be used for the first hour of the next day (e.g. use {{xt|00:10}} for ten minutes after midnight, not {{!xt|24:10}}). | ||
The numerical elements of times-of-day are figures ({{xt|12:45 | The numerical elements of times-of-day are figures ({{xt|12:45 p.m.}}) rather than words ({{!xt|twelve forty-five p.m.}}) though conventional terms such as {{xt|noon}} and {{xt|midnight}} are acceptable (taking care, with the latter, to avoid possible date ambiguity in constructions such as {{xt|midnight on July 17}}). | ||
====<span id="timezones"></span>Time zones==== | ====<span id="timezones"></span>Time zones==== | ||