Do not use an apostrophe when referring to decades:
- 1920s, 1930s, 1940s
- films of the 1940s
Use an apostrophe if indicating the decade’s possession:
- the 1940s’ best films
Use an apostrophe for two-digit decades:
- ’20s, ’30s, ’40s
Spell out the days of the week, do not use “th” or “nd” with numbers.
- June 13, 2003
- Tuesday, March 2
- When a month is used with a specific date, abbreviate Jan., Feb., Aug., Sept., Oct., Nov. and Dec. (Jan. 1, 2019). Spell out when using months alone or with a year alone: (January 2019).