diff --git a/src/formatDate.js b/src/formatDate.js
index 769e27661..e9309a1f4 100644
--- a/src/formatDate.js
+++ b/src/formatDate.js
@@ -8,7 +8,38 @@
  * @returns {string}
  */
 function formatDate(date, fromFormat, toFormat) {
-  // write code here
+  const fromSeparator = fromFormat[fromFormat.length - 1];
+  const toSeparator = toFormat[toFormat.length - 1];
+  const fromTokens = fromFormat.slice(0, -1);
+  const toTokens = toFormat.slice(0, -1);
+  const dateParts = date.split(fromSeparator);
+  const dateMap = {};
+
+  for (let i = 0; i < fromTokens.length; i++) {
+    dateMap[fromTokens[i]] = dateParts[i];
+  }
+
+  let year = dateMap['YYYY'] || dateMap['YY'];
+
+  if (dateMap['YY'] && !dateMap['YYYY']) {
+    const yyInt = parseInt(dateMap['YY'], 10);
+    const century = yyInt < 30 ? '20' : '19';
+
+    year = century + dateMap['YY'];
+  }
+
+  if (year) {
+    dateMap['YYYY'] = year;
+    dateMap['YY'] = year.slice(-2);
+  }
+
+  const result = [];
+
+  for (let i = 0; i < toTokens.length; i++) {
+    result.push(dateMap[toTokens[i]]);
+  }
+
+  return result.join(toSeparator);
 }
 
 module.exports = formatDate;