diff --git a/lib/workers/branch/schedule.js b/lib/workers/branch/schedule.js
index a03a69deff..a210423a02 100644
--- a/lib/workers/branch/schedule.js
+++ b/lib/workers/branch/schedule.js
@@ -172,6 +172,10 @@ function isScheduledNow(config) {
           return false;
         }
       }
+      // Check for week of year
+      if (schedule.wy && !schedule.wy.includes(now.week())) {
+        return false;
+      }
       logger.debug(`Matches schedule ${scheduleText}`);
       return true;
     });
diff --git a/test/workers/branch/schedule.spec.js b/test/workers/branch/schedule.spec.js
index 602c29fbb7..3026203aeb 100644
--- a/test/workers/branch/schedule.spec.js
+++ b/test/workers/branch/schedule.spec.js
@@ -202,5 +202,17 @@ describe('workers/branch/schedule', () => {
       const res = schedule.isScheduledNow(config);
       expect(res).toBe(true);
     });
+    it('approves valid weeks of year', () => {
+      config.schedule = ['every 2 weeks of the year before 08:00 on Monday'];
+      mockDate.set('2017-01-02T06:00:00.000'); // Locally Monday, 2 January 2017 6am (first Monday of the year)
+      const res = schedule.isScheduledNow(config);
+      expect(res).toBe(true);
+    });
+    it('rejects on weeks of year', () => {
+      config.schedule = ['every 2 weeks of the year before 08:00 on Monday'];
+      mockDate.set('2017-01-09T06:00:00.000'); // Locally Monday, 2 January 2017 6am (second Monday of the year)
+      const res = schedule.isScheduledNow(config);
+      expect(res).toBe(false);
+    });
   });
 });