It appears you have a well-structured Git repository with various files, including SVG icons and HTML documents. Here's a brief overview:

backend/node_modules/date-fns/isWeekend/index.js

@@ -0,0 +1,33 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = isWeekend;
+var _index = _interopRequireDefault(require("../toDate/index.js"));
+var _index2 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
+/**
+ * @name isWeekend
+ * @category Weekday Helpers
+ * @summary Does the given date fall on a weekend?
+ *
+ * @description
+ * Does the given date fall on a weekend?
+ *
+ * @param {Date|Number} date - the date to check
+ * @returns {Boolean} the date falls on a weekend
+ * @throws {TypeError} 1 argument required
+ *
+ * @example
+ * // Does 5 October 2014 fall on a weekend?
+ * const result = isWeekend(new Date(2014, 9, 5))
+ * //=> true
+ */
+function isWeekend(dirtyDate) {
+  (0, _index2.default)(1, arguments);
+  var date = (0, _index.default)(dirtyDate);
+  var day = date.getDay();
+  return day === 0 || day === 6;
+}
+module.exports = exports.default;