diff --git a/fortune_generator/js/fortune.js b/fortune_generator/js/fortune.js
index 788ea69..25df2ff 100644
--- a/fortune_generator/js/fortune.js
+++ b/fortune_generator/js/fortune.js
@@ -133,12 +133,14 @@ function daysDiff(eventIndex) {
   }
   const triggerDate = event.triggerDate;
 
+  let isCustomEvent = false;
   eventYear = year;
   if ('year' in triggerDate) {
     eventYear = validateNumber(triggerDate.year, 1, maxDate.getFullYear(), 'triggerDate.year', event);
     if (eventYear === null) {
       return -1;
     }
+    isCustomEvent = true;
   }
 
   if (!('month' in triggerDate)) {
@@ -179,12 +181,17 @@ function daysDiff(eventIndex) {
     eventDate = firstTargetDay + (triggerDate.week - 1) * 7;
   }
 
+  if (!isCustomEvent && (month > eventMonth || (month == eventMonth && date > eventDate))) {
+    eventYear += 1;
+  }
+
   const endDate = new Date(
     eventYear,
     eventMonth - 1,
     eventDate,
   );
 
+
   // calculate the difference in milliseconds and convert it to days
   const timeDiff = Math.ceil((endDate - startDate) / (1000 * 60 * 60 * 24));
   return timeDiff;
diff --git a/fortune_generator/json/custom_special.json b/fortune_generator/json/custom_special.json
index ff81a74..2d07d60 100644
--- a/fortune_generator/json/custom_special.json
+++ b/fortune_generator/json/custom_special.json
@@ -1,3 +1,67 @@
 {
-  "special_events": []
+  "special_events": [
+    {
+      "event": "夏至",
+      "triggerDate": {
+        "year": "2025",
+        "month": "6",
+        "date": "21"
+      },
+      "status_index": "0",
+      "goodFortunes": {
+        "l_1_event": "觀賞日出和日落",
+        "l_1_desc": "享受一年最長的白天",
+        "l_2_event": "",
+        "l_2_desc": ""
+      },
+      "badFortunes": {
+        "r_1_event": "",
+        "r_1_desc": "",
+        "r_2_event": "",
+        "r_2_desc": ""
+      }
+    },
+    {
+      "event": "中秋節",
+      "triggerDate": {
+        "year": "2025",
+        "month": "10",
+        "date": "6"
+      },
+      "status_index": "0",
+      "goodFortunes": {
+        "l_1_event": "賞月",
+        "l_1_desc": "與家人一同賞月，增進感情",
+        "l_2_event": "吃月餅",
+        "l_2_desc": "與家人朋友分享月餅的美味"
+      },
+      "badFortunes": {
+        "r_1_event": "",
+        "r_1_desc": "",
+        "r_2_event": "",
+        "r_2_desc": ""
+      }
+    },
+    {
+      "event": "冬至",
+      "triggerDate": {
+        "year": "2025",
+        "month": "12",
+        "date": "21"
+      },
+      "status_index": "0",
+      "goodFortunes": {
+        "l_1_event": "吃湯圓",
+        "l_1_desc": "團團圓圓",
+        "l_2_event": "保暖",
+        "l_2_desc": "冬至到了"
+      },
+      "badFortunes": {
+        "r_1_event": "",
+        "r_1_desc": "",
+        "r_2_event": "",
+        "r_2_desc": ""
+      }
+    }
+  ]
 }
diff --git a/fortune_generator/json/cyclical_special.json b/fortune_generator/json/cyclical_special.json
index ee429f0..953fa43 100644
--- a/fortune_generator/json/cyclical_special.json
+++ b/fortune_generator/json/cyclical_special.json
@@ -662,26 +662,6 @@
         "r_2_desc": ""
       }
     },
-    {
-      "event": "冬至",
-      "triggerDate": {
-        "month": "12",
-        "date": "22"
-      },
-      "status_index": "0",
-      "goodFortunes": {
-        "l_1_event": "吃湯圓",
-        "l_1_desc": "團團圓圓",
-        "l_2_event": "保暖",
-        "l_2_desc": "冬至到了"
-      },
-      "badFortunes": {
-        "r_1_event": "",
-        "r_1_desc": "",
-        "r_2_event": "",
-        "r_2_desc": ""
-      }
-    },
     {
       "event": "平安夜",
       "triggerDate": {
diff --git a/fortune_generator/json/static_special.json b/fortune_generator/json/static_special.json
index d079489..ff81a74 100644
--- a/fortune_generator/json/static_special.json
+++ b/fortune_generator/json/static_special.json
@@ -1,46 +1,3 @@
 {
-  "special_events": [
-    {
-      "event": "夏至",
-      "triggerDate": {
-        "year": "2025",
-        "month": "6",
-        "date": "21"
-      },
-      "status_index": "0",
-      "goodFortunes": {
-        "l_1_event": "觀賞日出和日落",
-        "l_1_desc": "享受一年最長的白天",
-        "l_2_event": "",
-        "l_2_desc": ""
-      },
-      "badFortunes": {
-        "r_1_event": "",
-        "r_1_desc": "",
-        "r_2_event": "",
-        "r_2_desc": ""
-      }
-    },
-    {
-      "event": "中秋節",
-      "triggerDate": {
-        "year": "2025",
-        "month": "10",
-        "date": "6"
-      },
-      "status_index": "0",
-      "goodFortunes": {
-        "l_1_event": "賞月",
-        "l_1_desc": "與家人一同賞月，增進感情",
-        "l_2_event": "吃月餅",
-        "l_2_desc": "與家人朋友分享月餅的美味"
-      },
-      "badFortunes": {
-        "r_1_event": "",
-        "r_1_desc": "",
-        "r_2_event": "",
-        "r_2_desc": ""
-      }
-    }
-  ]
+  "special_events": []
 }