diff --git a/spec/core/HDateTime.spec.ts b/spec/core/HDateTime.spec.ts
index 6273fe2..06260b8 100644
--- a/spec/core/HDateTime.spec.ts
+++ b/spec/core/HDateTime.spec.ts
@@ -398,6 +398,10 @@ describe('HDateTime', function (): void {
 				expect(getTimeZone('New_York')).toBe('America/New_York')
 			})
 
+			it('returns a timezone that contains multiple segements', () => {
+				expect(getTimeZone('Knox')).toBe('America/Indiana/Knox')
+			})
+
 			it('returns an empty string for an invalid timezone', function (): void {
 				expect(getTimeZone('FooBar')).toBe('')
 			})
@@ -416,6 +420,12 @@ describe('HDateTime', function (): void {
 				)
 			})
 
+			it('returns a valid timezone that contains multiple segements', () => {
+				expect(HDateTime.getIANATimeZone('La_Rioja')).toBe(
+					'America/Argentina/La_Rioja'
+				)
+			})
+
 			it('returns an empty string for an invalid timezone', function (): void {
 				expect(HDateTime.getIANATimeZone('FooBar')).toBe('')
 			})
diff --git a/src/core/HDateTime.ts b/src/core/HDateTime.ts
index 03d92f5..6f8bbb0 100644
--- a/src/core/HDateTime.ts
+++ b/src/core/HDateTime.ts
@@ -48,6 +48,10 @@ const TIMEZONE_PREFIXES = [
 	'Mexico',
 	'Pacific',
 	'US',
+	'America/Argentina',
+	'America/Indiana',
+	'America/Kentucky',
+	'America/North_Dakota',
 ]
 
 /**