diff --git a/README.md b/README.md
index 0704269..050ab37 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,7 @@ Algorithm、Review、Tip、Share
 |703|[Kth Largest Element in a Stream](https://leetcode.com/problems/kth-largest-element-in-a-stream/)|[Java](./week06/algo/lc703/KthLargest.java)|Easy|
 |1103|[Distribute Candies to People](https://leetcode.com/problems/distribute-candies-to-people/)|[Java](./week14/algo/lc1103/Solution.java)|Easy|
 |1108|[Defanging an IP Address](https://leetcode.com/problems/defanging-an-ip-address/)|[Java](./week16/algo/lc1108/Solution.java)|Easy|
+|1154|[Day of the Year](https://leetcode.com/problems/day-of-the-year/)|[Java](./week24/algo/lc1154/Solution.java)|Easy|
 
 ## Review
 
diff --git a/week24/algo/lc1154/Solution.java b/week24/algo/lc1154/Solution.java
new file mode 100644
index 0000000..4c1c0b9
--- /dev/null
+++ b/week24/algo/lc1154/Solution.java
@@ -0,0 +1,35 @@
+package com.milley.dayoftheyear;
+
+public class Solution {
+    public static int dayOfYear(String date) {
+        char[] dateArray = date.toCharArray();
+        int totalDays = 0;
+        int year, month, day;
+
+        int[] DAYS_OF_MONTH = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
+
+        year = 1000 * (dateArray[0] - '0') + 100 * (dateArray[1] - '0') +
+                10 * (dateArray[2] - '0') + (dateArray[3] - '0');
+        month = 10 * (dateArray[5] - '0') + (dateArray[6] - '0');
+        day = 10 * (dateArray[8] - '0') + (dateArray[9] - '0');
+
+        boolean isLeafYear = (year % 4 == 0 && year % 100 != 0) || (year % 100 == 0 && year % 400 == 0);
+        if (month > 2 && isLeafYear) {
+            totalDays += 1;
+        }
+        while (month > 1) {
+            totalDays += DAYS_OF_MONTH[month - 2];
+            month--;
+        }
+        totalDays += day;
+
+        return totalDays;
+    }
+
+    public static void main(String[] args) {
+        System.out.println(dayOfYear("2019-01-09"));
+        System.out.println(dayOfYear("2019-02-10"));
+        System.out.println(dayOfYear("2003-03-01"));
+        System.out.println(dayOfYear("2004-03-01"));
+    }
+}