1 files changed, 32 insertions, 0 deletions
diff --git a/date-fns/src/endOfSecond/index.ts b/date-fns/src/endOfSecond/index.ts
new file mode 100644
index 0000000..2f185be
--- /dev/null
+++ b/date-fns/src/endOfSecond/index.ts
@@ -0,0 +1,32 @@
+import toDate from '../toDate/index'
+import requiredArgs from '../_lib/requiredArgs/index'
+
+/**
+ * @name endOfSecond
+ * @category Second Helpers
+ * @summary Return the end of a second for the given date.
+ *
+ * @description
+ * Return the end of a second for the given date.
+ * The result will be in the local timezone.
+ *
+ * ### 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 original date
+ * @returns {Date} the end of a second
+ * @throws {TypeError} 1 argument required
+ *
+ * @example
+ * // The end of a second for 1 December 2014 22:15:45.400:
+ * const result = endOfSecond(new Date(2014, 11, 1, 22, 15, 45, 400))
+ * //=> Mon Dec 01 2014 22:15:45.999
+ */
+export default function endOfSecond(dirtyDate: Date | number): Date {
+  requiredArgs(1, arguments)
+
+  const date = toDate(dirtyDate)
+  date.setMilliseconds(999)
+  return date
+}