diff --git a/zerolog.go b/zerolog.go
index 3807b2c..77cfbb7 100644
--- a/zerolog.go
+++ b/zerolog.go
@@ -105,7 +105,9 @@ func (h *Handler) endLog(rec *slog.Record, evt *zerolog.Event) {
 		evt.Str(zerolog.CallerFieldName, fmt.Sprintf("%s:%d", frame.File, frame.Line))
 	}
 
-	evt.Time(zerolog.TimestampFieldName, rec.Time)
+	if !rec.Time.IsZero() {
+		evt.Time(zerolog.TimestampFieldName, rec.Time)
+	}
 	evt.Msg(rec.Message)
 }
 
diff --git a/zerolog_test.go b/zerolog_test.go
index a0bb96a..003e8c7 100644
--- a/zerolog_test.go
+++ b/zerolog_test.go
@@ -235,6 +235,38 @@ func TestZerolog_Group(t *testing.T) {
 	}
 }
 
+// TestZerolog_ZeroTime verifies that a zero timestamp will not be logged.
+//   - "- If r.Time is the zero time, ignore the time."
+//   - https://pkg.go.dev/log/slog@master#Handler
+func TestZerolog_ZeroTime(t *testing.T) {
+	out := bytes.Buffer{}
+	hdl := NewJsonHandler(&out, &HandlerOptions{AddSource: true})
+	_ = hdl.Handle(context.Background(),
+		slog.NewRecord(time.Time{}, slog.LevelInfo, "foobar", 0))
+	m := map[string]any{}
+	if err := json.NewDecoder(&out).Decode(&m); err != nil {
+		t.Fatalf("Failed to json decode log output: %s", err.Error())
+	}
+	if _, found := m[slog.TimeKey]; found {
+		t.Fatalf("Empty '%s' key %v", slog.TimeKey, m[slog.TimeKey])
+	}
+}
+
+// TestZerolog_NonZeroTime verifies that a non-zero timestamp will be logged.
+func TestZerolog_NonZeroTime(t *testing.T) {
+	out := bytes.Buffer{}
+	hdl := NewJsonHandler(&out, &HandlerOptions{AddSource: true})
+	_ = hdl.Handle(context.Background(),
+		slog.NewRecord(time.Now(), slog.LevelInfo, "foobar", 0))
+	m := map[string]any{}
+	if err := json.NewDecoder(&out).Decode(&m); err != nil {
+		t.Fatalf("Failed to json decode log output: %s", err.Error())
+	}
+	if now, found := m[slog.TimeKey]; !found && now != nil {
+		t.Fatalf("No '%s' key %v", slog.TimeKey, m[slog.TimeKey])
+	}
+}
+
 func TestZerolog_AddSource(t *testing.T) {
 	out := bytes.Buffer{}
 	hdl := NewJsonHandler(&out, &HandlerOptions{AddSource: true})