@angular/common

getLocaleFirstDayOfWeek

function

Deprecated

Retrieves the first day of the week for the given locale.

getLocaleFirstDayOfWeek(
  locale: string
): WeekDay;

getLocaleFirstDayOfWeek

WeekDay

@deprecated

Retrieves the first day of the week for the given locale.

@deprecated

Angular recommends relying on the Intl API for i18n. Intl's getWeekInfo has partial support (Chromium M99 & Safari 17). You may want to rely on the following alternatives:

Libraries like Luxon rely on Intl but fallback on the ISO 8601 definition (monday) if getWeekInfo is not supported.
Other librairies like date-fns, day.js or weekstart library provide their own locale based data for the first day of the week.

@paramlocalestring

A locale code for the locale format rules to use.

@returnsWeekDay