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+import toInteger from '../_lib/toInteger/index'
+import addQuarters from '../addQuarters/index'
+import requiredArgs from '../_lib/requiredArgs/index'
+
+/**
+ * @name subQuarters
+ * @category Quarter Helpers
+ * @summary Subtract the specified number of year quarters from the given date.
+ *
+ * @description
+ * Subtract the specified number of year quarters from the given date.
+ *
+ * ### v2.0.0 breaking changes:
+ *
+ * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
+ *
+ * @param {Date|Number} date - the date to be changed
+ * @param {Number} amount - the amount of quarters to be subtracted. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
+ * @returns {Date} the new date with the quarters subtracted
+ * @throws {TypeError} 2 arguments required
+ *
+ * @example
+ * // Subtract 3 quarters from 1 September 2014:
+ * const result = subQuarters(new Date(2014, 8, 1), 3)
+ * //=> Sun Dec 01 2013 00:00:00
+ */
+export default function subQuarters(dirtyDate: Date | number, dirtyAmount: number): Date {
+  requiredArgs(2, arguments)
+
+  const amount = toInteger(dirtyAmount)
+  return addQuarters(dirtyDate, -amount)
+}