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diff --git a/date-fns/src/isThisSecond/index.ts b/date-fns/src/isThisSecond/index.ts
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+import isSameSecond from '../isSameSecond/index'
+import requiredArgs from '../_lib/requiredArgs/index'
+
+/**
+ * @name isThisSecond
+ * @category Second Helpers
+ * @summary Is the given date in the same second as the current date?
+ * @pure false
+ *
+ * @description
+ * Is the given date in the same second as the current date?
+ *
+ * > ⚠️ Please note that this function is not present in the FP submodule as
+ * > it uses `Date.now()` internally hence impure and can't be safely curried.
+ *
+ * ### 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 check
+ * @returns {Boolean} the date is in this second
+ * @throws {TypeError} 1 argument required
+ *
+ * @example
+ * // If now is 25 September 2014 18:30:15.500,
+ * // is 25 September 2014 18:30:15.000 in this second?
+ * var result = isThisSecond(new Date(2014, 8, 25, 18, 30, 15))
+ * //=> true
+ */
+export default function isThisSecond(dirtyDate: Date | number): boolean {
+  requiredArgs(1, arguments)
+
+  return isSameSecond(Date.now(), dirtyDate)
+}