1 files changed, 32 insertions, 0 deletions
diff --git a/date-fns/src/subDays/index.ts b/date-fns/src/subDays/index.ts
new file mode 100644
index 0000000..7c706c3
--- /dev/null
+++ b/date-fns/src/subDays/index.ts
@@ -0,0 +1,32 @@
+import toInteger from '../_lib/toInteger/index'
+import addDays from '../addDays/index'
+import requiredArgs from '../_lib/requiredArgs/index'
+
+/**
+ * @name subDays
+ * @category Day Helpers
+ * @summary Subtract the specified number of days from the given date.
+ *
+ * @description
+ * Subtract the specified number of days 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 days 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 days subtracted
+ * @throws {TypeError} 2 arguments required
+ *
+ * @example
+ * // Subtract 10 days from 1 September 2014:
+ * const result = subDays(new Date(2014, 8, 1), 10)
+ * //=> Fri Aug 22 2014 00:00:00
+ */
+export default function subDays(dirtyDate: Date | number, dirtyAmount: number) {
+  requiredArgs(2, arguments)
+
+  const amount = toInteger(dirtyAmount)
+  return addDays(dirtyDate, -amount)
+}