📝 Commit Details:

backend/node_modules/date-fns/setISODay.js

@@ -0,0 +1,41 @@
+import { addDays } from "./addDays.js";
+import { getISODay } from "./getISODay.js";
+import { toDate } from "./toDate.js";
+
+/**
+ * The {@link setISODay} function options.
+ */
+
+/**
+ * @name setISODay
+ * @category Weekday Helpers
+ * @summary Set the day of the ISO week to the given date.
+ *
+ * @description
+ * Set the day of the ISO week to the given date.
+ * ISO week starts with Monday.
+ * 7 is the index of Sunday, 1 is the index of Monday, etc.
+ *
+ * @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
+ * @typeParam ResultDate - The result `Date` type, it is the type returned from the context function if it is passed, or inferred from the arguments.
+ *
+ * @param date - The date to be changed
+ * @param day - The day of the ISO week of the new date
+ * @param options - An object with options
+ *
+ * @returns The new date with the day of the ISO week set
+ *
+ * @example
+ * // Set Sunday to 1 September 2014:
+ * const result = setISODay(new Date(2014, 8, 1), 7)
+ * //=> Sun Sep 07 2014 00:00:00
+ */
+export function setISODay(date, day, options) {
+  const date_ = toDate(date, options?.in);
+  const currentDay = getISODay(date_, options);
+  const diff = day - currentDay;
+  return addDays(date_, diff, options);
+}
+
+// Fallback for modularized imports:
+export default setISODay;