Date and time notation in Australia
|Full date||18 October 2021|
Date and time notation in Australia most commonly records the date using the day-month-year format (18 October 2021), while the ISO 8601 format (2021-10-18) is increasingly used for all-numeric dates. The time can be written using either the 12-hour clock (11:34 pm) or the 24-hour clock (23:34).
- 18 October 2021
- 2021-10-18 or 18/10/2021
The month–day–year order (October 18, 2021) is sometimes used, usually informally in the mastheads of magazines, schools, newspapers, advertisements, video games, news, and TV shows. MDY in numeric-only form (10/18/2021) is never used.
Weeks are most identified by the last day of the week, either the Friday in business (e.g., "week ending 19/1") or the Sunday in other use (e.g., "week ending 21/1"). Week ending is often abbreviated to "W/E" or "W.E." The first day of the week or the day of an event are sometimes referred to (e.g., "week of 15/1"). Week numbers (as in "the third week of 2007") are not often used, but may appear in some business diaries in numeral-only form (e.g., "3" at the top or bottom of the page). ISO 8601 week notation (e.g. 2021-W42) is not widely understood. Some more traditional calendars instead treat Sunday as the first day of the week.
The Australian government allows writing the time using either the 24-hour clock (23:34), which is commonplace in technical fields such as military, aviation, computing, navigation, transportation and the sciences; or the 12-hour clock (11:34 pm). The before noon/after noon qualifier is usually written as "am" or "pm". A colon is the preferred time separator.
- "Latest News". News Corp Australia. Archived from the original on 4 November 2017. Retrieved 4 November 2017.
- "The West Australian Demo". The West Australian. 16 August 2016. Archived from the original on 1 September 2017. Retrieved 4 November 2017.
- Style manual for authors, editors and printers (6 ed.). John Wiley & Sons Australia. 2002. p. 171. ISBN 978-0-7016-3647-0.
- "Numbers and measurement". GOV.AU Content Guide. Retrieved 23 July 2018.