calendardayname

Calendardayname is the label used to represent the name of a day of the week for a given date in calendar systems and software. It is typically derived from the date’s day-of-week value and presented as a localized, human-readable string for display to users. The term emphasizes the display aspect rather than the underlying date computation.

In practice, calendardayname is highly locale-dependent. English locales often use “Monday” or the abbreviated “Mon”; other languages display localized forms such as “Lundi” (French), “lunes” (Spanish), or “Montag” (German). Abbreviations, capitalization, and diacritics vary by language and style guides. Some systems maintain both a full name and a short name form to fit different UI contexts.

Implementation considerations typically separate the storage of a date from its day name. Most date libraries provide functions to obtain the calendardayname from a date object, taking locale into account. The same date will yield different calendardayname values under different locales, even though the day-of-week remains constant. In some cases, developers store a fixed day-of-week code (e.g., 0–6) and generate the display name at presentation time.

Common uses include calendar displays, scheduling interfaces, event planning, and reporting. Accuracy relies on correct locale data and attention to accessibility, ensuring that users relying on screen readers or alternative input methods receive clear and correctly localized information.

See also: day of week, locale, date formatting, internationalization.