MM/DD/YYYY

Units & Measurements abbreviation · Time

MM/DD/YYYY
Stands forMonth/day/year (US date format)
CategoriesUnits & Measurements

MM/DD/YYYY stands for Month/day/year (US date format), a time abbreviation.

The numeric date order used in the United States, putting the month first: 07/04/2026 is July 4. Most of the world would read the same digits as 7 April.

Example: Expiration date must be entered as MM/DD/YYYY, for example 03/15/2027.

Usage notes

The month-first order mirrors spoken American English ("July 4th"). It is also common in the Philippines and appears alongside other formats in Canada, whose official standard is ISO 8601. Because dates such as 03/04/2026 are ambiguous internationally, aviation, computing and global business increasingly use YYYY-MM-DD or a written month name.

More time abbreviations

  • JD – Julian date (Julian Day number)
  • kya – Thousand years ago
  • m – Minute (informal)
  • Ma – Megaannum (million years)
  • min – Minute
  • MM – Month (two-digit, in date formats)
  • mo – Month
  • MoM – Month over month
  • ms – Millisecond
  • MTD – Month to date
  • mya – Million years ago
  • ns – Nanosecond

See all 51 time abbreviations →

Edited by the AbbreviationList.com team. Spotted an error or a missing meaning? Contact us.