Numbers in dates

Don’t use ordinal numbers (1st, 2nd, 3rd, etc.) in dates.

For month and year only, use Month YYYY.

Spell out days of the week when you’re referencing specific dates. Only abbreviate months in 3 letters (like Mar, Aug, Oct) for UI elements like tables, links, footers.

In extreme space-constrained cases, 1-letter abbreviations are OK. Mobile uses 3-letter month abbreviations (for example, Mar 9).

For countries that use 12 h time, capitalize AM and PM with no periods.

Decades

To indicate a decade, add an “s” without an apostrophe (examples: 1970s, 1990s).

Examples

Australia dates

Use DD/MM/YYYY (without a leading zero) or DD Month, YYYY.

31 January, 2007
30/11/2018
15 Mar
The site will be down for maintenance on Sunday, 18 August at 9:00 PM AWT.

Brazil
Use DD/MM/YYYY (without a leading zero) or DD month, YYYY. Months are always lower case.

31 january, 2007
30/11/2018
15 mar
The site will be down for maintenance on Sunday, 18 august at 9h.

Canada dates

Use: DD/MM/YYYY (without a leading zero) or Month DD, YYYY.

11/11/2016
November 11, 2016
November 2016
Saturday, December 8
Mar 15
M-F, 7 AM to 9 PM, PT
The site will be down for maintenance on Sunday, August 18 at 9:00 PM PT.

France dates

Use DD/MM/YYYY (without a leading zero) or DD Month, YYYY.

15/06/2016
Wednesday, 3 November 2016
14 November 2016
November 2016
15 Mar
The site will be down for maintenance on Sunday, 18 August at 9 h.

UK dates

Use DD/MM/YYYY, DD/MM, or DD Month, YYYY.

31/08/2016
31/08
31 Aug
Sunday, 18 August, at 9 PM GMT.
The site will be down for maintenance on Sunday, 18 August at 9 PM AWT.

US dates

Use: MM/DD/YYYY (without a leading zero) or Month DD, YYYY.

3/9/2018
11/11/2016
November 11, 2016
November 2016
Saturday, December 8
Mar 15
M-F, 7 AM to 9 PM, PT
The site will be down for maintenance on Sunday, August 18 at 9:00 PM PT.