Time/Date

• Use numerals when listing a time; 3 p.m., 3:30 p.m.
• Include a.m. and p.m. notation with periods in lowercase letters. Avoid the redundant: 6 a.m. in the morning.
• Spell out noon and midnight. Do not capitalize. Avoid the redundant: 12 noon or 12 midnight

Abbreviate these months when used with a specific date: January, February, August, September, October, November, December unless used in a formal invitation; (Spell out March, April, May, June and July in all references) e.g.:

Sept. 10 not September 10
Oct. 31 but March 4

When writing dates, use numerals only. Avoid the use of st, nd, rd, or th; e.g.:

The event is scheduled for Feb. 1. not The event is scheduled for Feb. 1st.

When writing any span of time; e.g.:

1998-2002 not 1998-02

 

Numbers

• Spell out numbers one through nine. Use numerals for numbers 10 and above.
• Use figures within a series if more than one number is more than 10; otherwise spell out numbers within a series; e.g.:

22 hours, 9 minutes, 6 seconds; 12 hats, 5 purses, and 16 pairs of shoes

• Phone numbers may be written in one of two ways:
• with the area code set off by parentheses; e.g.: (210) 829-6000
• with the use of hyphens; e.g. 210-829-6000
• Hours of the day; e.g.: 7 p.m. or 7:30 p.m.
• Amounts of money with dollar sign; e.g.: $3 or $3.50
• Always use numerals when referring to age; e.g.: 3-year-old Annie takes ballet. or Annie, 3, takes ballet.
• Do not:

1. begin a sentence with numerals; instead spell out the number or rephrase sentence. (A year is the exception)

2. add a numeral in parentheses after it’s written in words; e.g.:

 three copies, not three (3) copies