If the day of the month is not given, do not use a comma to separate the month and the year: The process began in April 2008.
Write time with lower-case letters and periods. Provide the digits for minutes only when necessary: 10 a.m.; 3:37 p.m.
Use ‘noon’ and ‘midnight’ rather than ’12 noon’ or ’12 midnight.’
In programs and other materials produced for meetings held outside the U.S., use 24-hour time: 0800 hours or 1537 hours.
Spelled-out time is not followed by a.m. or p.m. (seven o’clock in the evening).
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Since 1997, Shea Writing and Training Solutions (Shea) has been helping companies, engineers, and project and asset managers communicate effectively about critical topics: the health and safety of employees, effective and efficient employee performance, and the protection of assets. Our overall mission is to help our clients reduce risk, improve performance and protect lives.