diff --git a/src/formatDate.js b/src/formatDate.js
index 769e2766..ed92c23c 100644
--- a/src/formatDate.js
+++ b/src/formatDate.js
@@ -8,7 +8,44 @@
  * @returns {string}
  */
 function formatDate(date, fromFormat, toFormat) {
-  // write code here
+  const [fromPart1, fromPart2, fromPart3, separatorFrom] = fromFormat; //
+  const [toPart1, toPart2, toPart3, separatorTo] = toFormat; //
+  const [part1, part2, part3] = date.split(separatorFrom);
+  let result = date.split(separatorFrom).join(separatorTo);
+  let newPart;
+
+  if (fromPart1 === toPart3) {
+    result = date.split(separatorFrom).reverse().join(separatorTo);
+  }
+
+  if (fromPart1 === toPart2 && fromPart2 === toPart3) {
+    result = [part3, part1, part2].join(separatorTo);
+  }
+
+  if (fromPart3 === 'YYYY' && toPart3 === 'YY') {
+    newPart = part3.slice(-2);
+
+    result = [part1, part2, newPart].join(separatorTo);
+  }
+
+  if (fromPart3 === 'YYYY' && toPart3 === 'YY') {
+    newPart = part3.slice(-2);
+    result = [part1, part2, newPart].join(separatorTo);
+  }
+
+  if (fromPart1 === 'YY' && toPart1 === 'YYYY') {
+    if (Number(part1) < 30) {
+      result = '20' + result;
+    }
+  }
+
+  if (fromPart1 === 'YY' && toPart1 === 'YYYY') {
+    if (part1 >= 30) {
+      result = '19' + result;
+    }
+  }
+
+  return result;
 }
 
 module.exports = formatDate;