diff --git a/leapYears/leapYears.js b/leapYears/leapYears.js
index 7884b78..f6b3e00 100644
--- a/leapYears/leapYears.js
+++ b/leapYears/leapYears.js
@@ -1,5 +1,5 @@
-var leapYears = function() {
-
+var leapYears = function(year) {
+  return year % 4 === 0 && ( year % 100 !== 0 || year % 400 == 0)
 }
 
 module.exports = leapYears
diff --git a/leapYears/leapYears.spec.js b/leapYears/leapYears.spec.js
index b58dadb..0af23c3 100644
--- a/leapYears/leapYears.spec.js
+++ b/leapYears/leapYears.spec.js
@@ -4,19 +4,19 @@ describe('leapYears', function() {
   it('works with non century years', function() {
     expect(leapYears(1996)).toEqual(true);
   });
-  xit('works with non century years', function() {
+  it('works with non century years', function() {
     expect(leapYears(1997)).toEqual(false);
   });
-  xit('works with ridiculously futuristic non century years', function() {
+  it('works with ridiculously futuristic non century years', function() {
     expect(leapYears(34992)).toEqual(true);
   });
-  xit('works with century years', function() {
+  it('works with century years', function() {
     expect(leapYears(1900)).toEqual(false);
   });
-  xit('works with century years', function() {
+  it('works with century years', function() {
     expect(leapYears(1600)).toEqual(true);
   });
-  xit('works with century years', function() {
+  it('works with century years', function() {
     expect(leapYears(700)).toEqual(false);
   });
 });