Spell out the month when used alone or with a specific year (no comma).

Example: The initial meeting was February 2004.

For specific dates, always spell out March, April, May, June, and July and abbreviate Jan., Feb., Aug., Sept., Oct., Nov., and Dec.

Examples:  March 12 was a windy day.

                    Feb. 12 was a windy day.

For month, day, and year together, insert a comma after the day and year.

 Example: February 12, 2004, was the last day.

For time, use the abbreviations a.m. and p.m. (Instead of: am and pm). See time zones.

Recommended that you include day of the week, but keep in mind that one common mistake is having either day or date wrong.