Days, Months, and Seasons: Capitalization
Days and months function as names and normally take initial capitals; generic seasons normally do not. The useful distinction is not “all calendar words are capitalized” but proper-name status plus the governing house style. A named event, official title, or branded program can change the treatment of an otherwise generic season word.
Capitalize names of days and months, such as Monday and October. Generic season names such as spring, summer, autumn/fall, and winter are usually lowercase in the reviewed government style unless another rule makes the word part of a proper name or title.
Key details
Important caveats
Proper Name Boundary
Capitalize a season word when another rule independently requires it—for example, when it is part of an official event, program, publication title, or other proper name. Do not capitalize a generic season merely because it names a time of year.
Further guidance
Days And Months
Use initial capitals for day and month names: “Tuesday,” “March,” and “September.” Their abbreviations preserve the capital: “Tue,” “Mar,” “Sept.”
Seasons
Use lowercase for generic season names in the reviewed Australian Government style: “winter,” “spring,” “summer,” and “autumn.” The same source lowercases recurrent seasonal events such as “summer solstice.”
Worked Examples
“The course begins on Monday, 12 October.” “We travel in winter.” “The Winter Arts Festival opens in July” only if “Winter Arts Festival” is the event’s formal name.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Dates and time — Australian Government Style Manual (opens in a new tab)Australian Government Style Manual · Australian Government guidance for day–month–year dates, ordinal dates, decades, centuries, time zones, and en-dash spacing in date/time spans