Present times using colons between the hours and minutes.
Use the 12 hour clock.
Use 'am' and 'pm'.
In time ranges use 'to' rather than a dash.
Refer to 'midnight' and 'midday', not '12:00' or '00:00'.
For durations use numerals. Describe durations by the largest unit of time possible, followed by any remaining smaller units (for example, hours followed by minutes.)
If a time immediately follows a date include some text (such as 'at' or 'from') between the date and time. Using a comma to separate dates and times, or not using anything, can cause information to be misread by screen readers.
✔ 9:00am to 5:30pm
✔ The presentation will last around 1 hour and 30 minutes
✘ The presentation will last around 90 minutes
✔ 5 September at 10:30am
✘ 5 September, 10:30am