go integration and wikipedia

frontend/node_modules/date-fns/setQuarter.js

@@ -0,0 +1,31 @@
+"use strict";
+exports.setQuarter = setQuarter;
+var _index = require("./setMonth.js");
+var _index2 = require("./toDate.js");
+
+/**
+ * @name setQuarter
+ * @category Quarter Helpers
+ * @summary Set the year quarter to the given date.
+ *
+ * @description
+ * Set the year quarter to 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 date to be changed
+ * @param quarter - The quarter of the new date
+ *
+ * @returns The new date with the quarter set
+ *
+ * @example
+ * // Set the 2nd quarter to 2 July 2014:
+ * const result = setQuarter(new Date(2014, 6, 2), 2)
+ * //=> Wed Apr 02 2014 00:00:00
+ */
+function setQuarter(date, quarter) {
+  const _date = (0, _index2.toDate)(date);
+  const oldQuarter = Math.trunc(_date.getMonth() / 3) + 1;
+  const diff = quarter - oldQuarter;
+  return (0, _index.setMonth)(_date, _date.getMonth() + diff * 3);
+}