September 2017 Update

Task/Day-of-the-week/JavaScript/day-of-the-week-3.js

@@ -0,0 +1,19 @@
+(() => {
+    'use strict';
+
+    // xmasIsSunday :: Integer -> Bool
+    const xmasIsSunday = year => (new Date(year, 11, 25))
+            .getDay() === 0;
+
+    // range :: Int -> Int -> [Int]
+    const range = (m, n) =>
+        Array.from({
+            length: Math.floor(n - m) + 1
+        }, (_, i) => m + i);
+
+
+
+    return range(2008, 2121)
+        .filter(xmasIsSunday);
+
+})();

Task/Day-of-the-week/JavaScript/day-of-the-week-4.js

@@ -0,0 +1 @@
+[2011, 2016, 2022, 2033, 2039, 2044, 2050, 2061, 2067, 2072, 2078, 2089, 2095, 2101, 2107, 2112, 2118]