diff --git a/poc-memory/src/store/types.rs b/poc-memory/src/store/types.rs
index d5164f8..691b49a 100644
--- a/poc-memory/src/store/types.rs
+++ b/poc-memory/src/store/types.rs
@@ -129,7 +129,16 @@ pub fn now_epoch() -> i64 {
 /// Returns (year, month, day, hour, minute, second).
 pub fn epoch_to_local(epoch: i64) -> (i32, u32, u32, u32, u32, u32) {
     use chrono::{Datelike, Local, TimeZone, Timelike};
-    let dt = Local.timestamp_opt(epoch, 0).unwrap();
+    let dt = match Local.timestamp_opt(epoch, 0) {
+        chrono::LocalResult::Single(dt) => dt,
+        chrono::LocalResult::Ambiguous(dt, _) => dt,
+        chrono::LocalResult::None => {
+            // DST gap — add an hour to land in valid local time
+            Local.timestamp_opt(epoch + 3600, 0)
+                .earliest()
+                .unwrap_or_else(|| chrono::Utc.timestamp_opt(epoch, 0).unwrap().with_timezone(&Local))
+        }
+    };
     (
         dt.year(),
         dt.month(),