Dates
Use standard format (January 15, 2021). International geographies use their own standards.
In general, spell out months. Three-letter abbreviations are acceptable when needed for space: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec.
Date Ranges
- Use “to” when range is in a sentence (from 1918 to 1919, available Monday to Friday).
- All other cases use en dashes, not hyphen (1918–1919, 4:00.–5:00 p.m. ET, Monday–Friday).
- Use both numbers in date ranges (1918–1919 not 1918-19).
Time
Use full hour and minute, including time localization in parentheses. Capitalized with no periods, no spaces: 4:00 PM (ET)