diff --git a/Cargo.lock b/Cargo.lock
index 16e16962..0bcdab28 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1160,7 +1160,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_builtins"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "chrono",
  "fast-float",
@@ -1185,7 +1185,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_bytecode"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "num-bigint",
  "oxide_log",
@@ -1193,7 +1193,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_cfg"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "oxide_bytecode",
  "oxide_emit",
@@ -1204,7 +1204,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_cli"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "ansi_term",
  "bumpalo",
@@ -1228,7 +1228,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_code_cache"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "lru",
  "oxide_bytecode",
@@ -1237,7 +1237,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_compiler"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1258,7 +1258,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_dce"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1272,7 +1272,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_emit"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "num-bigint",
  "oxc_allocator",
@@ -1288,7 +1288,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_engine"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "oxide_bytecode",
  "oxide_compiler",
@@ -1300,7 +1300,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_fold"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "num-bigint",
  "oxide_bytecode",
@@ -1312,7 +1312,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_ir"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "oxide_bytecode",
  "oxide_log",
@@ -1321,7 +1321,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_kernel"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "bumpalo",
  "dashmap",
@@ -1335,7 +1335,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_liveness"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1347,7 +1347,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_log"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "tracing",
  "tracing-appender",
@@ -1356,11 +1356,11 @@ dependencies = [
 
 [[package]]
 name = "oxide_net"
-version = "0.19.18"
+version = "0.19.19"
 
 [[package]]
 name = "oxide_parser"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "oxc_allocator",
  "oxc_ast",
@@ -1375,7 +1375,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_regalloc"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1391,7 +1391,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_runtime_api"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "num-bigint",
  "num-traits",
@@ -1404,7 +1404,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_test262"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "oxide_bytecode",
  "oxide_compiler",
@@ -1424,7 +1424,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_types"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "bumpalo",
  "dashmap",
@@ -1437,7 +1437,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_vm"
-version = "0.19.18"
+version = "0.19.19"
 dependencies = [
  "bumpalo",
  "chrono",
diff --git a/Cargo.toml b/Cargo.toml
index 16f95766..84cf83a6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.19.18"
+version = "0.19.19"
 edition = "2021"
 license = "MIT"
 rust-version = "1.80"
diff --git a/crates/oxide_builtins/src/date.rs b/crates/oxide_builtins/src/date.rs
index ad860aa2..057a33b2 100644
--- a/crates/oxide_builtins/src/date.rs
+++ b/crates/oxide_builtins/src/date.rs
@@ -594,6 +594,8 @@ fn two_digits(b: &[u8]) -> Option<i64> {
 /// - 两种形态：`Www Mmm DD YYYY HH:MM:SS GMT±HHMM`（toString）与
 ///   `Www, DD Mmm YYYY HH:MM:SS GMT`（toUTCString）；星期名不校验。
 /// - 年号带符号（负年 `-` 前缀），时分秒与偏移均按十进制数字解析。
+/// - 年号超出 ±275760（TimeClip 包络可表示的极端年）必越界，按不可解析
+///   处理返回 None，日数乘积随之有界，不溢出 i64。
 fn parse_engine_date_string(s: &str) -> Option<f64> {
     let tokens: Vec<&str> = s.split_whitespace().collect();
     if tokens.len() != 6 {
@@ -607,6 +609,10 @@ fn parse_engine_date_string(s: &str) -> Option<f64> {
     let m = MONTH_NAMES.iter().position(|n| *n == mon_s)? as i64 + 1;
     let d = two_digits(day_s.as_bytes())?;
     let y = parse_signed_year(year_s)?;
+    // 年号超出包络可表示的极端年必越 TimeClip 归 NaN，且日数乘积需有界防溢出。
+    if !(-275_760..=275_760).contains(&y) {
+        return None;
+    }
     let (h, mi, sec) = parse_hms(time_s)?;
     let offset_min = if off_s == "GMT" {
         0
diff --git a/crates/oxide_vm/tests/builtins_date_tests.rs b/crates/oxide_vm/tests/builtins_date_tests.rs
index 76e31de4..a3b9678e 100644
--- a/crates/oxide_vm/tests/builtins_date_tests.rs
+++ b/crates/oxide_vm/tests/builtins_date_tests.rs
@@ -1085,6 +1085,17 @@ fn date_parse_invalid_calendar_rejected() {
     assert!(r.as_double().is_nan());
 }
 
+#[test]
+fn date_parse_engine_format_year_beyond_envelope_is_nan() {
+    let mut vm = Vm::new();
+    // 引擎自身输出形态的年号超出 TimeClip 包络：归 NaN，不 panic、不环绕。
+    let r = eval(&mut vm, "Date.parse('Wed, 05 Aug 300000000 12:00:00 GMT')").unwrap();
+    assert!(r.as_double().is_nan());
+    // 负年同侧越界同样归 NaN。
+    let r = eval(&mut vm, "Date.parse('Wed, 05 Aug -300000000 12:00:00 GMT')").unwrap();
+    assert!(r.as_double().is_nan());
+}
+
 // ── toISOString 6 位年与 TimeClip 边界 ──
 
 #[test]