Use this form: month, day, year as in May 16, 2009.
Do not use numerical day, month, year with either periods or slashes, i.e., 01.02.2010 or 01/02/2010 (Note: In U.S. English, this date with slashes means January 2, 2010.)
Use of Commas:
– When a phrase lists only a month and a year, do not set off the year with a comma.
– When a phrase uses a month, day and year, set off the year with a comma.
– If the day of the month is included but not the year, set off the date with a comma.
January 1972 was the coldest month.
February 14, 1987, was the target date.
She testified that it was Friday, December 3, when the accident occurred.
Always use cardinal numbers when the year is not included as in January 3, February 6, or January 2. Do not use ordinal numbers, i.e., January 3rd.
Dragoman Style Guide for Figures