Dates & Time

In General

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

    • Example: Thursday, November 11, 11:00 AM – 1:30 PM

  • Use numbers for dates without ordinal indicators (no 1st, 2nd, 14th, etc.)

  • Use en dash (–) between start and 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 or 11:00 AM – 1:30 PM)

    • When possible, use noon and midnight instead of 12 PM and 12 AM

  • Capitalize AM and PM to follow the best practice for accessibility

  • 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.

Last updated March 1, 2022