📝 Commit Details:

backend/node_modules/date-fns/getISODay.js

@@ -0,0 +1,34 @@
+import { toDate } from "./toDate.js";
+
+/**
+ * The {@link getISODay} function options.
+ */
+
+/**
+ * @name getISODay
+ * @category Weekday Helpers
+ * @summary Get the day of the ISO week of the given date.
+ *
+ * @description
+ * Get the day of the ISO week of the given date,
+ * which is 7 for Sunday, 1 for Monday etc.
+ *
+ * ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date
+ *
+ * @param date - The given date
+ * @param options - An object with options
+ *
+ * @returns The day of ISO week
+ *
+ * @example
+ * // Which day of the ISO week is 26 February 2012?
+ * const result = getISODay(new Date(2012, 1, 26))
+ * //=> 7
+ */
+export function getISODay(date, options) {
+  const day = toDate(date, options?.in).getDay();
+  return day === 0 ? 7 : day;
+}
+
+// Fallback for modularized imports:
+export default getISODay;