diff --git a/pttodoest/src/main.rs b/pttodoest/src/main.rs
index 48e7200..e878779 100755
--- a/pttodoest/src/main.rs
+++ b/pttodoest/src/main.rs
@@ -503,6 +503,13 @@ impl Delta {
 struct Task(serde_yaml::Value);
 
 impl Task {
+    pub fn due(&self, after: u64) -> bool {
+        match self.next_due(after) {
+            Some(ts) => Delta::now_time() > ts,
+            None => true,
+        }
+    }
+
     pub fn next_due(&self, after: u64) -> Option<u64> {
         match self.schedule() {
             Some(schedule) => self.parse_schedule_next(schedule, after),
@@ -585,6 +592,7 @@ mod test_task {
         let task = Task(serde_yaml::Value::String("hello world".to_string()));
         assert_eq!(None, task.schedule());
         assert_eq!(Some(1 as u64), task.next_due(100));
+        assert!(task.due(100));
     }
 
     #[test]
@@ -594,6 +602,7 @@ mod test_task {
         let task = Task(serde_yaml::Value::Mapping(m));
         assert_eq!(Some("2006-01-02".to_string()), task.schedule());
         assert_eq!(Some(1136160000 as u64), task.next_due(100));
+        assert!(task.due(100));
     }
 
     #[test]
@@ -603,6 +612,7 @@ mod test_task {
         let task = Task(serde_yaml::Value::Mapping(m));
         assert_eq!(Some("2036-01-02".to_string()), task.schedule());
         assert_eq!(Some(2082844800 as u64), task.next_due(100));
+        assert!(!task.due(100));
     }
 
     #[test]
@@ -612,6 +622,7 @@ mod test_task {
         let task = Task(serde_yaml::Value::Mapping(m));
         assert_eq!(Some("2036-01-02T16".to_string()), task.schedule());
         assert_eq!(Some(2082902400 as u64), task.next_due(100));
+        assert!(!task.due(100));
     }
 
     #[test]
@@ -621,6 +632,7 @@ mod test_task {
         let task = Task(serde_yaml::Value::Mapping(m));
         assert_eq!(Some("1h".to_string()), task.schedule());
         assert_eq!(Some(3700), task.next_due(100));
+        assert!(task.due(100));
     }
 
     #[test]
@@ -630,6 +642,7 @@ mod test_task {
         let task = Task(serde_yaml::Value::Mapping(m));
         assert_eq!(Some("* * * * *".to_string()), task.schedule());
         assert_eq!(Some(120 as u64), task.next_due(100));
+        assert!(task.due(100));
     }
 }