Dates & Time

In General

  • Thursday, November 11, 11:00 am – 1:30 pm

  • Day of the week and month capitalized and spelled out, use figures for dates

  • Plain date number, no English suffix (no 1st, 2nd, 14th, etc.)

  • Use en dash (–) between start & end times

  • Use either am or pm only at the end of the time range unless crossing noon or midnight (7:00 – 9:00 pm vs. 11:00 am – 1:30 pm)

    • When possible, use noon and midnight instead of 12 pm and 12 am

  • Time periods

    • Use en dash (–)

    • Do not repeat the century (1979–81)

  • Decades

    • 1920s or ‘20s

  • Year notation

    • Use BCE (before common era) and CE (common era) to note years in the Gregorian calendar rather than BC and AD (respectively "Before Christ" and Anno Domini, "in [the] year of [the] Lord"). The abbreviations BCE and CE always follow the year number.