go integration and wikipedia

frontend/node_modules/date-fns/getDay.js

@@ -0,0 +1,28 @@
+"use strict";
+exports.getDay = getDay;
+var _index = require("./toDate.js");
+
+/**
+ * @name getDay
+ * @category Weekday Helpers
+ * @summary Get the day of the week of the given date.
+ *
+ * @description
+ * Get the day of the week of the given date.
+ *
+ * @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).
+ *
+ * @param date - The given date
+ *
+ * @returns The day of week, 0 represents Sunday
+ *
+ * @example
+ * // Which day of the week is 29 February 2012?
+ * const result = getDay(new Date(2012, 1, 29))
+ * //=> 3
+ */
+function getDay(date) {
+  const _date = (0, _index.toDate)(date);
+  const day = _date.getDay();
+  return day;
+}