Expressing times

Expressing dates

In general, spell out the names of months and days of the week in full. Give the full four-digit year, not a two-digit abbreviation.
Recommended: January 19, 2017
If including the day of the week, add it before the month as follows: DAY_OF_WEEK, MONTH_DAY, YEAR.
Recommended: Tuesday, April 27, 2021

Partial dates and abbreviations

When giving only the month and year, don't use a comma.
Recommended: She was hired in January 2017.
In most cases, don't abbreviate the day of the week or the month. However, when conserving space, such as in a heading or table, it's okay to abbreviate the month and the day of the week to their three-letter abbreviations. Capitalize the first letter and do not add a period at the end of the abbreviation.
If you abbreviate, do so for the entire date. Don't mix written-out forms with abbreviated forms in the same date.
Be consistent in where you apply abbreviations throughout your documentation. For example, if you choose to abbreviate in table cells, do so in all table cells.
Recommended: Mon, Sep 3, 2018
Not recommended: Mon, September 3, 2018