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diff --git a/date-fns/src/parseJSON/index.ts b/date-fns/src/parseJSON/index.ts
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+import toDate from '../toDate/index'
+import requiredArgs from '../_lib/requiredArgs/index'
+
+/**
+ * @name parseJSON
+ * @category Common Helpers
+ * @summary Parse a JSON date string
+ *
+ * @description
+ * Converts a complete ISO date string in UTC time, the typical format for transmitting
+ * a date in JSON, to a JavaScript `Date` instance.
+ *
+ * This is a minimal implementation for converting dates retrieved from a JSON API to
+ * a `Date` instance which can be used with other functions in the `date-fns` library.
+ * The following formats are supported:
+ *
+ * - `2000-03-15T05:20:10.123Z`: The output of `.toISOString()` and `JSON.stringify(new Date())`
+ * - `2000-03-15T05:20:10Z`: Without milliseconds
+ * - `2000-03-15T05:20:10+00:00`: With a zero offset, the default JSON encoded format in some other languages
+ * - `2000-03-15T05:20:10+05:45`: With a positive or negative offset, the default JSON encoded format in some other languages
+ * - `2000-03-15T05:20:10+0000`: With a zero offset without a colon
+ * - `2000-03-15T05:20:10`: Without a trailing 'Z' symbol
+ * - `2000-03-15T05:20:10.1234567`: Up to 7 digits in milliseconds field. Only first 3 are taken into account since JS does not allow fractional milliseconds
+ * - `2000-03-15 05:20:10`: With a space instead of a 'T' separator for APIs returning a SQL date without reformatting
+ *
+ * For convenience and ease of use these other input types are also supported
+ * via [toDate]{@link https://date-fns.org/docs/toDate}:
+ *
+ * - A `Date` instance will be cloned
+ * - A `number` will be treated as a timestamp
+ *
+ * Any other input type or invalid date strings will return an `Invalid Date`.
+ *
+ * @param {String|Number|Date} argument A fully formed ISO8601 date string to convert
+ * @returns {Date} the parsed date in the local time zone
+ * @throws {TypeError} 1 argument required
+ */
+export default function parseJSON(argument: string): Date {
+  requiredArgs(1, arguments)
+
+  if (typeof argument === 'string') {
+    const parts = argument.match(
+      /(\d{4})-(\d{2})-(\d{2})[T ](\d{2}):(\d{2}):(\d{2})(?:\.(\d{0,7}))?(?:Z|(.)(\d{2}):?(\d{2})?)?/
+    )
+    if (parts) {
+      // Group 8 matches the sign
+      return new Date(
+        Date.UTC(
+          +parts[1],
+          +parts[2] - 1,
+          +parts[3],
+          +parts[4] - (+parts[9] || 0) * (parts[8] == '-' ? -1 : 1),
+          +parts[5] - (+parts[10] || 0) * (parts[8] == '-' ? -1 : 1),
+          +parts[6],
+          +((parts[7] || '0') + '00').substring(0, 3)
+        )
+      )
+    }
+    return new Date(NaN)
+  }
+  return toDate(argument)
+}