Date and time notation in the United States

Date and time notation in the United States [refresh]
Full dateNovember 22, 2024
22 November 2024
All-numeric date11/22/2024
2024-11-22
22 11 24
22 11 2024
Time1:22 pm
13:22

Date and time notation in the United States differs from that used in nearly all other countries. It is inherited from one historical branch of conventions from the United Kingdom.[citation needed] American styles of notation have also influenced customs of date notation in Canada, creating confusion in international commerce.[1]

In traditional American usage, dates are written in the month–day–year order (e.g. November 22, 2024) with a comma before and after the year if it is not at the end of a sentence[2] and time in 12-hour notation (1:22 pm).

International date and time formats typically follow the ISO 8601 format (2024-11-22) for all-numeric dates,[3] write the time using the 24-hour clock (13:22),[4] and notate the date using a day–month–year format (22 November 2024).[5] These forms are increasingly common in American professional, academic, technological, military, and other internationally oriented environments.

  1. ^ Sanderson, Blair (18 January 2016). "Proposed legislation aims to settle date debate". CBC News. Retrieved 25 September 2017.
  2. ^ "9.31: Month and day". The Chicago Manual of Style (17 ed.). Chicago: The University of Chicago Press. 2017. ISBN 978-0-226-28705-8.
  3. ^ "9.36: ISO style for dates". The Chicago Manual of Style (17 ed.). Chicago: The University of Chicago Press. 2017. ISBN 978-0-226-28705-8.
  4. ^ Cite error: The named reference CMoS9.39 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference CMoS9.35 was invoked but never defined (see the help page).