Are days of the week capitalized

are days of the week capitalized

Are days of the week capitalized is the same question as the title, typed in lowercase. In English they are. Monday is a proper name for that weekday, so it takes a capital in running text, in lists, and in dates: Monday, 3 September. You do not write monday in a sentence except as an error, a stylised logo, or a programming identifier that a style guide allowed. The rule is the name, not the position in the week.

Are the days of the week capitalized, are days of week capitalized, and are day of the week capitalized ask for that same capital. Dropping “the,” dropping “s,” or adding “the” does not change the answer. Each named day is a proper noun in English. The generic words day, week, weekday, and weekend are common nouns. You write “on Friday” and “on the weekend,” not “on the Friday” unless you mean a specific one already in view, and you still capitalise Friday.

Months follow the same English habit: January, not january. Seasons usually do not: summer, not Summer, unless a title or a personification. Do not copy the weekday rule onto every time-word. Do not withhold the capital from Thursday because it sits mid-sentence. The capital is on the name, not on the first word of the sentence only.

Titles, lists, and mid-sentence use

In a heading, the weekday still takes its capital even if the rest of the heading is sentence case. In a poster that shouts in all caps, MONDAY is a display choice, not a different spelling rule; when the shout ends, it returns to Monday. In a table of seven rows, each row starts with a capital because each row is a name, not because it is the start of a paragraph.

Hyphenated adjectives keep the capital on the day: a Monday-morning meeting. Plural names keep it too: Mondays are busy. Possessives keep it: Monday’s agenda. None of those forms licence a lowercase m. A hashtag or a filename may squash the letters for a machine; that is a constraint of the medium, not a new grammar. When you bring the word back into a sentence, restore the capital.

Name the day with a capital: Tuesday, not tuesday. Leave “days of the week” in lowercase except at the start of a sentence or in a title. Capitalise the day inside a date line: Thursday, 1 January. Do not capitalise summer, autumn, weekday, or weekend unless a title needs it.

In German, capitalise the weekday because it is a noun, not because English said so. Style books for news and for books agree on the English weekday capital. They disagree on many other things. You do not need a house-style argument to write Friday in a letter. You need one if you are writing “the Fourth of July” versus “the fourth of July,” which is a holiday question, not a weekday question.

Other languages do not copy English case

German capitalises every noun, so Montag is capitalised even though German is not copying English proper-name rules. Spanish and French usually write lunes and lundi in lowercase in running text, unless the word starts the sentence or sits in a title. A bilingual poster that copies Monday’s capital onto lunes is following English, not Spanish. Match the language you are actually writing.

Monday takes a capital because it is a name. “Days of the week” does not, because it is a description of the drawer those names live in. Code and data are allowed to be ugly. A JSON key “monday” can stay lowercase if the schema said so. A user-facing label should not. If you display weekdays to a person reading English, give them Monday. If you display them to a person reading German, give them Montag. If you display them as data to a parser, follow the schema and stop claiming it is prose.