Numbers

Spell out cardinal numbers, (one, two, and so on) and ordinal numbers (first, second, and so on) below 10, but use numerals for numbers 10 and above.

Three people stood in line for the concert. On the last day, 12 people asked for their money back.

Exception:

If a passage contains two or more numbers that refer to the same category of information and one is 10 or higher, use numerals. When numbers are treated consistently, readers can recognize the relationship between them more easily.

The delegation included 3 women and 11 men.

Use a.m. and p.m. for indicating time. Use Eastern Standard Time (EST) when observing standard time and Eastern Daylight time (EDT) when observing daylight saving time.

The webinar will be held on Friday, August 27 at 4 p.m. EDT.

Do not use “th” endings or their equivalent when stating dates (i.e., do not write Join us August 27th).

Note:

Exceptions can be made in social media posts to meet character count requirements and in graphics for aesthetic and space purposes.

Format as follows: XXX-XXX-XXXX

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