From e49cdf93b46f30fd621cad2328091a9c1a15250c Mon Sep 17 00:00:00 2001
From: mShan0 <96149598+mShan0@users.noreply.github.com>
Date: Wed, 7 Feb 2024 13:23:40 -0800
Subject: [PATCH] change datetime2 range check

---
 src/data-types/datetime2.ts | 10 +++++-----
 test/unit/data-type.js      |  4 +++-
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/src/data-types/datetime2.ts b/src/data-types/datetime2.ts
index 5299c3b9d..93ce132c7 100644
--- a/src/data-types/datetime2.ts
+++ b/src/data-types/datetime2.ts
@@ -5,9 +5,6 @@ import WritableTrackingBuffer from '../tracking-buffer/writable-tracking-buffer'
 const EPOCH_DATE = LocalDate.ofYearDay(1, 1);
 const NULL_LENGTH = Buffer.from([0x00]);
 
-const MIN_DATE = new Date('January 1, 0001');
-const MAX_DATE = new Date('December 31, 9999');
-
 const DateTime2: DataType & { resolveScale: NonNullable<DataType['resolveScale']> } = {
   id: 0x2A,
   type: 'DATETIME2N',
@@ -118,11 +115,14 @@ const DateTime2: DataType & { resolveScale: NonNullable<DataType['resolveScale']
 
     // TODO: check date range: January 1, 0001, through December 31, 9999
     //    : time range: 00:00:00 through 23:59:59.997
+    let year;
     if (options && options.useUTC) {
-      value = new Date(value.toUTCString());
+      year = value.getUTCFullYear();
+    } else {
+      year = value.getFullYear();
     }
 
-    if (value < MIN_DATE || value > MAX_DATE) {
+    if (year < 1 || year > 9999) {
       throw new TypeError('Out of range.');
     }
 
diff --git a/test/unit/data-type.js b/test/unit/data-type.js
index 83cc9d3a4..3268a2253 100644
--- a/test/unit/data-type.js
+++ b/test/unit/data-type.js
@@ -322,7 +322,9 @@ describe('DateTime2', function() {
   describe('.validate', function() {
     it('returns a TypeError for dates that are out of range', function() {
       assert.throws(() => {
-        TYPES.DateTime2.validate(new Date('Dec 31, 2000'));
+        const testDate = new Date();
+        testDate.setFullYear(0);
+        TYPES.DateTime2.validate(testDate);
       }, TypeError, 'Out of range.');
 
       assert.throws(() => {