diff --git a/Libraries/LibJS/Runtime/DateConstructor.cpp b/Libraries/LibJS/Runtime/DateConstructor.cpp
index 505d53fb3df..17f8ad8d8a5 100644
--- a/Libraries/LibJS/Runtime/DateConstructor.cpp
+++ b/Libraries/LibJS/Runtime/DateConstructor.cpp
@@ -194,6 +194,7 @@ static double parse_date_string(VM& vm, StringView date_string)
         "%a%t%b%t%e%t%Y"sv,                    // "Wed Nov 20 2024"
         "%Y-%m-%d%t%H:%M:%S%z"sv,              // "2024-12-30 03:00:00+0000"
         "%Y-%m-%d%t%H:%M:%S%X"sv,              // "2025-01-13 00:00:00.000"
+        "%Y-%m-%eT%T%z"sv,                     // "2021-04-21T15:00:00+0000"
     };
 
     for (auto const& format : extra_formats) {
diff --git a/Libraries/LibJS/Tests/builtins/Date/Date.parse.js b/Libraries/LibJS/Tests/builtins/Date/Date.parse.js
index 1759b76d7b3..b7ecc5147b3 100644
--- a/Libraries/LibJS/Tests/builtins/Date/Date.parse.js
+++ b/Libraries/LibJS/Tests/builtins/Date/Date.parse.js
@@ -46,6 +46,7 @@ test("basic functionality", () => {
     expect(Date.parse("2025-01-02 14:00:00+0000")).toBe(1735826400000);
     expect(Date.parse("Wednesday, Jan 15, 2025")).toBe(1736920800000);
     expect(Date.parse("2025-01-13 00:00:00.000")).toBe(1736748000000);
+    expect(Date.parse("2021-04-21T15:00:00+0000")).toBe(1619017200000);
 
     // FIXME: Create a scoped time zone helper when bytecode supports the `using` declaration.
     setTimeZone(originalTimeZone);