diff --git a/postman/src/sender.rs b/postman/src/sender.rs
index 1bfd6af..cff5c86 100644
--- a/postman/src/sender.rs
+++ b/postman/src/sender.rs
@@ -345,7 +345,10 @@ WHERE
     }
 
     async fn refresh(&self, pool: impl Executor<'_, Database = Database> + Copy) {
-        if self.interval_seconds.is_some() || self.interval_months.is_some() {
+        if self.interval_seconds.is_some()
+            || self.interval_months.is_some()
+            || self.interval_days.is_some()
+        {
             let now = Utc::now();
             let mut updated_reminder_time =
                 self.utc_time.with_timezone(&self.timezone.parse().unwrap_or(Tz::UTC));
@@ -365,9 +368,11 @@ WHERE
                     updated_reminder_time = updated_reminder_time
                         .checked_add_days(Days::new(interval as u64))
                         .unwrap_or_else(|| {
-                            warn!("Could not add days to a reminder");
+                            warn!(
+                                "Could not add days to a reminder. Falling back to naive addition"
+                            );
 
-                            updated_reminder_time
+                            updated_reminder_time + 86400 * interval
                         });
                 }