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Date and time


  • Do not use ordinals in dates (a July 2 meeting, not a July 2nd meeting).
  • Do not abbreviate days or months in body text (meeting was held Tuesday, February 15, not Tues., Feb. 15).
  • Set off the year from the month with a comma. Use this form for decades: 1960s (no apostrophe). When omitting the century, use left-facing apostrophe before the number: the ’60s

Examples: Monday, September 3, 2002; August, 2005; 2000-01; class of ’89


  • Time is written in figures, except noon and midnight.
  • The :00 isn’t necessary except to make lists look tidier.
  • a.m., p.m. (not am, pm with no periods)
  • Acceptable: 9 o’clock this morning; 8 in the evening
  • Redundant: 8 p.m. tonight

Examples: 10 a.m., 10:30 a.m., noon, 2 to 4 p.m., midnight.