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backend/node_modules/date-fns/esm/isWeekend/index.d.ts

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+// This file is generated automatically by `scripts/build/typings.js`. Please, don't change it.
+
+import { isWeekend } from 'date-fns'
+export default isWeekend

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

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+import toDate from "../toDate/index.js";
+import requiredArgs from "../_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
+ */
+export default function isWeekend(dirtyDate) {
+  requiredArgs(1, arguments);
+  var date = toDate(dirtyDate);
+  var day = date.getDay();
+  return day === 0 || day === 6;
+}

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

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+// @flow
+// This file is generated automatically by `scripts/build/typings.js`. Please, don't change it.
+
+export type Interval = {
+  start: Date | number,
+  end: Date | number,
+}
+
+export type Locale = {
+  code?: string,
+  formatDistance?: (...args: Array<any>) => any,
+  formatRelative?: (...args: Array<any>) => any,
+  localize?: {
+    ordinalNumber: (...args: Array<any>) => any,
+    era: (...args: Array<any>) => any,
+    quarter: (...args: Array<any>) => any,
+    month: (...args: Array<any>) => any,
+    day: (...args: Array<any>) => any,
+    dayPeriod: (...args: Array<any>) => any,
+  },
+  formatLong?: {
+    date: (...args: Array<any>) => any,
+    time: (...args: Array<any>) => any,
+    dateTime: (...args: Array<any>) => any,
+  },
+  match?: {
+    ordinalNumber: (...args: Array<any>) => any,
+    era: (...args: Array<any>) => any,
+    quarter: (...args: Array<any>) => any,
+    month: (...args: Array<any>) => any,
+    day: (...args: Array<any>) => any,
+    dayPeriod: (...args: Array<any>) => any,
+  },
+  options?: {
+    weekStartsOn?: 0 | 1 | 2 | 3 | 4 | 5 | 6,
+    firstWeekContainsDate?: 1 | 2 | 3 | 4 | 5 | 6 | 7,
+  },
+}
+
+export type Duration = {
+  years?: number,
+  months?: number,
+  weeks?: number,
+  days?: number,
+  hours?: number,
+  minutes?: number,
+  seconds?: number,
+}
+
+export type Day = 0 | 1 | 2 | 3 | 4 | 5 | 6
+
+declare module.exports: (date: Date | number) => boolean

backend/node_modules/date-fns/esm/isWeekend/package.json

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+{
+  "sideEffects": false,
+  "typings": "../../typings.d.ts"
+}