Fix(Fortune): Calculate the time difference for events that have already occurred based on the next year

For example, if today is January 2nd, then the New Year's Day on January 1st should be calculated using January 1st of the next year.

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;