diff --git a/src/date/duration.spec.ts b/src/date/duration.spec.ts
index f625070..9976dcf 100644
--- a/src/date/duration.spec.ts
+++ b/src/date/duration.spec.ts
@@ -62,6 +62,10 @@ describe('duration', () => {
       expect(secondsToReadableDuration(444444)).toBe('5d 3h');
     });
 
+    it('handles 24 hours', () => {
+      expect(secondsToReadableDuration(691200)).toBe('8d');
+    });
+
     it('handles decimal duration inputs', () => {
       expect(secondsToReadableDuration(2565.568)).toBe('43m');
     });
diff --git a/src/date/duration.ts b/src/date/duration.ts
index d63192c..61ab4a1 100644
--- a/src/date/duration.ts
+++ b/src/date/duration.ts
@@ -56,6 +56,10 @@ export const secondsToReadableDuration = (seconds: number | unknown) => {
       (normalizedSeconds - days * (60 * 60 * 24)) / 60 / 60
     );
 
+    if (hour === 24) {
+      return `${days + 1}${fDay}`;
+    }
+
     return `${days}${fDay}${hour > 0 ? ` ${hour}${fHour}` : ''}`;
   }