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Lewis & Clark Style Guide


  • Use commas to set off the year when using full dates.

She was born on September 15, 1985, in Los Angeles.

  • Do not use commas when using only month-and-year constructions.

Planning began in September 1995.

  • Do not use 1st, 2nd, 3rd, 4th, and so on with dates.

July 21
April 2

  • Use the year if referring to a date not in the current calendar year.

Rory Williams and Amy Pond had a baby in December 2011.
The Songs had a baby in January (of this year).

  • Use the following models when referring to periods of years:

She worked from 1949 to 1961.
He worked in 1949–50. (for an academic year)
He worked in the 1950s. (for a decade)
Avoid ’50s. Do not use 1950’s.

  • See also months and en dash.

Lewis & Clark Style Guide

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