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Dates, Times, and Seasons

No st, nd, rd, or th on dates.
Example: January 1, not January 1st.

Use the month-day-year format in formal writing.
Example: January 25, 2016.

In instances where a numeric date form is preferred, such as a chart, or in cases where sorting data is important, use ISO style: use numbers to represent the year in full, the month, and then the day, separating each element by a hyphen.
Example: 2011-12-11.

Where space restrictions require the names of the months be abbreviated, abbreviate the following months: Jan., Feb., Aug., Sept., Oct., Nov., and Dec.

When referring to the academic year, use a slash to indicate the last part of one year and the first part of the next.
Example: 2009/10.

Only insert commas with a full date.
April 2, 1981. (comma)
April 1981. (no comma)

Don’t use apostrophes.
1990s. (not 1990’s)

When omitting the century, use an inverted apostrophe.
’90s. (not ’90’s)

Use the year only when referring to one other than the current year.
Example: The group first met on Sept. 13, 2009. They have accomplished little since that date.

But if the meeting occurred in the current year, don’t include the year.
Example: At a Sept. 13 meeting.

Never abbreviate days of the week.
Example: Monday, July 4. (not Mon. July 4)

No :00 for exact hours.
Example: The event is at 9 a.m. (not 9:00 a.m.)

12 noon and 12 midnight. (rather than 12 a.m. or 12 p.m.)

a.m. and p.m. Use periods after each letter, no space between. Use lower-case; never use caps. If indicating a range of time, do not use a.m. or p.m. after the first reference unless it is different than the following time.
Example: 9 – 9:30 a.m., but 9 a.m. – 6 p.m.

Do not capitalize names of seasons unless part of a formal title.
The fall leaves are beautiful.
Ivey’s Fall Lecture Series.

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