📝 Commit Details:

backend/node_modules/date-fns/setWeek.js

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+import { getWeek } from "./getWeek.js";
+import { toDate } from "./toDate.js";
+
+/**
+ * The {@link setWeek} function options.
+ */
+
+/**
+ * @name setWeek
+ * @category Week Helpers
+ * @summary Set the local week to the given date.
+ *
+ * @description
+ * Set the local week to the given date, saving the weekday number.
+ * The exact calculation depends on the values of
+ * `options.weekStartsOn` (which is the index of the first day of the week)
+ * and `options.firstWeekContainsDate` (which is the day of January, which is always in
+ * the first week of the week-numbering year)
+ *
+ * Week numbering: https://en.wikipedia.org/wiki/Week#The_ISO_week_date_system
+ *
+ * @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 week - The week of the new date
+ * @param options - An object with options
+ *
+ * @returns The new date with the local week set
+ *
+ * @example
+ * // Set the 1st week to 2 January 2005 with default options:
+ * const result = setWeek(new Date(2005, 0, 2), 1)
+ * //=> Sun Dec 26 2004 00:00:00
+ *
+ * @example
+ * // Set the 1st week to 2 January 2005,
+ * // if Monday is the first day of the week,
+ * // and the first week of the year always contains 4 January:
+ * const result = setWeek(new Date(2005, 0, 2), 1, {
+ *   weekStartsOn: 1,
+ *   firstWeekContainsDate: 4
+ * })
+ * //=> Sun Jan 4 2004 00:00:00
+ */
+export function setWeek(date, week, options) {
+  const date_ = toDate(date, options?.in);
+  const diff = getWeek(date_, options) - week;
+  date_.setDate(date_.getDate() - diff * 7);
+  return toDate(date_, options?.in);
+}
+
+// Fallback for modularized imports:
+export default setWeek;