diff --git a/builtins_test.go b/builtins_test.go
index b719911..6628c65 100644
--- a/builtins_test.go
+++ b/builtins_test.go
@@ -298,8 +298,8 @@ func TestBuiltinDateAndTime(t *testing.T) {
 func TestBuiltinDateArgs(t *testing.T) {
 	for tmpl, want := range map[string]string{
 		`"{date(1990-13-01,1990-12-31,'2006-01-02')}"`:     "1990-13-01",
-		`"{date(1990-12-31,1990-01-01,'2006-01-02')}"`:     "before",
-		`"{date(1990-01-01,1990-01-01,'2006-01-02')}"`:     "before",
+		`"{date(1990-12-31,1990-01-01,'2006-01-02')}"`:     "is after",
+		`"{date(1990-01-01,1990-01-01,'2006-01-02')}"`:     "write it as text",
 		`"{date(1990-01-01,1990-12-31,2006-01-02)}"`:       "'2006-01-02'",
 		`"{date(1990-01-01,1990-12-31,'January 2, 2006)}"`: "'",
 		`"{date(1990-01-01,1990-12-31,'x')}"`:              "text",
@@ -318,3 +318,49 @@ func TestBuiltinDateArgs(t *testing.T) {
 		}
 	}
 }
+
+// TestBuiltinLayoutErrorsNameARunnableSpelling pins the two layout errors a user
+// can follow: a double-quoted layout is named single-quoted, without its own
+// quotes carried into the suggestion, and a bare one says a shell ate them.
+func TestBuiltinLayoutErrorsNameARunnableSpelling(t *testing.T) {
+	_, err := compile(parse(t, `"{date(1990-01-01,1990-12-31,\"2006-01-02\")}"`))
+	if err == nil || !strings.Contains(err.Error(), "write '2006-01-02'") {
+		t.Fatalf("a double-quoted layout = %v, want it named single-quoted", err)
+	}
+	if strings.Contains(err.Error(), `'"`) {
+		t.Errorf("%v names a layout that renders its own quotes", err)
+	}
+	_, err = compile(parse(t, `"{time(15:04)}"`))
+	if err == nil || !strings.Contains(err.Error(), "write '15:04'") || !strings.Contains(err.Error(), "shell") {
+		t.Fatalf("a bare layout = %v, want it named quoted and the shell explained", err)
+	}
+	// The comma hint belongs to a layout that split, not to a call given extra args.
+	_, err = compile(parse(t, `"{time(0,12,'15:04')}"`))
+	if err == nil || !strings.Contains(err.Error(), "takes 1 argument, got 3") {
+		t.Fatalf("time with three args = %v, want the count named in the singular", err)
+	}
+	if strings.Contains(err.Error(), "holding a comma") {
+		t.Errorf("%v offers the comma hint though the layout is already quoted", err)
+	}
+}
+
+// TestBuiltinDateSpansOneDay pins that from == to is a day: with a clock layout it
+// draws every second of it, and without one it could only emit one value.
+func TestBuiltinDateSpansOneDay(t *testing.T) {
+	f := engine(1)
+	seen := map[string]bool{}
+	for i := 0; i < 500; i++ {
+		got := mustRender(t, f, `"{date(2026-01-01,2026-01-01,'2006-01-02 15:04:05')}"`)
+		if !strings.HasPrefix(got, "2026-01-01 ") {
+			t.Fatalf("date over one day = %q, out of range", got)
+		}
+		seen[got] = true
+	}
+	if len(seen) < 400 {
+		t.Fatalf("date over one day drew %d distinct seconds in 500, want the whole day", len(seen))
+	}
+	_, err := compile(parse(t, `"{date(2026-01-01,2026-01-01,'2006-01-02')}"`))
+	if err == nil || !strings.Contains(err.Error(), "write it as text") {
+		t.Fatalf("one day in a date-only layout = %v, want it named a constant", err)
+	}
+}
diff --git a/data_test.go b/data_test.go
index 0368184..4051ca3 100644
--- a/data_test.go
+++ b/data_test.go
@@ -392,3 +392,25 @@ func TestShippedStreetNumberFormats(t *testing.T) {
 		}
 	}
 }
+
+// TestShippedUSTitleAgreesWithSex pins that one person's title and sex agree, and
+// that the everyday titles are reachable.
+func TestShippedUSTitleAgreesWithSex(t *testing.T) {
+	f := newGenerator(t, "data", WithSeed(4))
+	female := map[string]bool{"Miss": true, "Mrs": true, "Ms": true}
+	seen := map[string]bool{}
+	for i := 0; i < 3000; i++ {
+		got := fakeTemplate(t, f, `{/en_US.person.prefix}|{/en_US.person.sex}`)
+		title, sex, _ := strings.Cut(got, "|")
+		title = strings.TrimSpace(title)
+		seen[title] = true
+		if title == "Mr" && sex != "male" || female[title] && sex != "female" {
+			t.Fatalf("%q: the title contradicts the sex", got)
+		}
+	}
+	for _, want := range []string{"", "Mr", "Ms"} {
+		if !seen[want] {
+			t.Errorf("en_US.person.prefix never drew %q in 3000 draws", want)
+		}
+	}
+}
diff --git a/record_test.go b/record_test.go
index f75d8dd..e5ec7a3 100644
--- a/record_test.go
+++ b/record_test.go
@@ -547,3 +547,18 @@ func TestRecordTemplateRejectsATopLevelRepeat(t *testing.T) {
 		t.Errorf("NewTemplate on the same input = %v, want the string view to still compile", err)
 	}
 }
+
+// TestRecordOfAFieldlessCategoryNamesTheWrapper pins the way out of the first
+// command a fixture author types: a category of one value has no columns, and the
+// error names the record that gives it one.
+func TestRecordOfAFieldlessCategoryNamesTheWrapper(t *testing.T) {
+	f := newGenerator(t, "data", WithSeed(1))
+	want := `'{"format":"","personnummer":"{/sv_SE.personnummer}"}'`
+	_, err := f.FakeRecord("sv_SE.personnummer")
+	if err == nil || !strings.Contains(err.Error(), want) {
+		t.Fatalf("FakeRecord(sv_SE.personnummer) = %v, want it to name %s", err, want)
+	}
+	if _, err := f.FakeRecordTemplate(`{"format":"","personnummer":"{/sv_SE.personnummer}"}`); err != nil {
+		t.Fatalf("the named wrapper does not render: %v", err)
+	}
+}
diff --git a/table_test.go b/table_test.go
index 1de23a1..e912adb 100644
--- a/table_test.go
+++ b/table_test.go
@@ -172,7 +172,7 @@ func TestTableSelectsARowByKeyOrName(t *testing.T) {
 	}
 	for path, want := range map[string]string{
 		"region[99]":                    `"99"`,
-		"locality[Sandby]":              "L7 L8",
+		"locality[Sandby]":              "L7, L8",
 		"region[12].code[1]":            "not a table",
 		"region[]":                      "empty",
 		"region[12":                     "]",
@@ -334,7 +334,7 @@ func TestTableSelectorInAReference(t *testing.T) {
 	}
 	for name, c := range map[string]struct{ json, want string }{
 		"unknown row":          {`"{/region[99].name}"`, `"99"`},
-		"ambiguous name":       {`"{/locality[Sandby].name}"`, "L7 L8"},
+		"ambiguous name":       {`"{/locality[Sandby].name}"`, "L7, L8"},
 		"not inside":           {`"{/region[12].municipality[0180].name}"`, "not inside"},
 		"selector on template": {`"{/x[1].a}"`, "not a table"},
 	} {
@@ -744,3 +744,32 @@ func TestNamedTableWithoutAKeyResolvesInsideItsParent(t *testing.T) {
 		t.Fatalf("a name selected inside a pinned parent = %q", got)
 	}
 }
+
+// TestAmbiguousNameNamesARunnablePath pins what a shell user reads: each row is
+// named as the path they can type, from the root, and the rows are listed plainly.
+func TestAmbiguousNameNamesARunnablePath(t *testing.T) {
+	files := map[string]string{}
+	for name, body := range siblings() {
+		files["se/"+name] = body
+	}
+	files["se/street.json"] = `{"format":"{name}","rows":"street.tsv","name":"name","parent":"locality","weight":"segments"}`
+	f := newGenerator(t, writeFiles(t, files), WithSeed(1))
+	_, err := f.Fake("se.street[Sandbyvägen]")
+	if err == nil {
+		t.Fatal("se.street[Sandbyvägen] resolved, though two rows carry that name")
+	}
+	for _, want := range []string{"se.locality[L7].street[Sandbyvägen]", "se.locality[L8].street[Sandbyvägen]"} {
+		if !strings.Contains(err.Error(), want) {
+			t.Errorf("%v does not name %s", err, want)
+		}
+		if got := fake(t, f, want); got != "Sandbyvägen" {
+			t.Errorf("Fake(%q) = %q, want the named path to run", want, got)
+		}
+	}
+	if strings.Contains(err.Error(), "[se.locality") {
+		t.Errorf("%v lists the rows as a Go slice; separate them with commas", err)
+	}
+	if _, err := f.Fake("se.locality[Sandby]"); err == nil || !strings.Contains(err.Error(), "one of L7, L8") {
+		t.Fatalf("se.locality[Sandby] = %v, want its keys listed plainly", err)
+	}
+}