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Dates and Times


Dates

  • Spell out all months standing alone or with a year alone:
    - August, August 2011, but Aug. 17, 2011

  • Abbreviate only Jan., Feb., Aug., Sept., Oct., Nov. and Dec.
    - Spell out March, April, May, June, July

  • Weekdays are abbreviated only in tabular matter and without periods
    - Eg: if listed in a table: Mon, Tue, Wed, Thu, Fri, Sat

  • Show dates using the month first, date second and year third:
     - Oct. 27, 2011

  • When writing decade names in numerals, do not use an apostrophe before the "s." An apostrophe precedes the shortened numerical form of the decade:
     - the 1930s, the '30s, the mid-1930s

  • When expressing dates without a year, do not use the ordinal form:
     - November 8, not November 8th

  • Date range - write the numbers out using an en dash (slightly longer than a hyphen), not a slash:
     - 2011-2012 or 1987-89 (not '87-'89)
    *Note: The one exception is in the expression of academic year:
    - the 2011/12 academic year

Times

  • Use periods for lowercase abbreviations a.m. and p.m.
     - 10 a.m. (not 10:00 a.m.) but 5:30 p.m.
     - 1:30-5 p.m. (one ‘p.m.') rather than 1:30 p.m.-5 p.m.
     - noon or midnight, not 12 a.m. or 12 p.m., to avoid confusion

  • Use "from" and "to" when writing a range of times but use an en dash in tables:
     - Reception, 7-10 p.m.
     - The meeting went from 9 to 10:30 a.m.