It appears that the repository has undergone several changes and renamings:

backend/node_modules/date-fns/isTuesday.cjs

@@ -1,29 +0,0 @@
-"use strict";
-exports.isTuesday = isTuesday;
-var _index = require("./toDate.cjs");
-
-/**
- * The {@link isTuesday} function options.
- */
-
-/**
- * @name isTuesday
- * @category Weekday Helpers
- * @summary Is the given date Tuesday?
- *
- * @description
- * Is the given date Tuesday?
- *
- * @param date - The date to check
- * @param options - An object with options
- *
- * @returns The date is Tuesday
- *
- * @example
- * // Is 23 September 2014 Tuesday?
- * const result = isTuesday(new Date(2014, 8, 23))
- * //=> true
- */
-function isTuesday(date, options) {
-  return (0, _index.toDate)(date, options?.in).getDay() === 2;
-}