See also Practicalities (Opening Hours)
Use ‘am’ and ‘pm’, closed up with the digit, no full point.
Use ‘noon’ and ‘midnight’, not ‘12 noon’ and ‘12 midnight’ or ‘12pm’ and ‘12am’.
Use ‘to’, not a hyphen or en dash, to denote ranges of time in narrative text. This does not apply to times in practicalities in POI tickers and elsewhere (see Practicalities: Formatting Opening Hours).
2pm to 5pm
For text following British spelling, use a full point between hour and minute.
10.30am, 9.15am
For text following US spelling, use a colon between hour and minute.
10:30am, 9:15am