diff --git a/sql-plugin/src/main/scala/com/nvidia/spark/rapids/GpuOverrides.scala b/sql-plugin/src/main/scala/com/nvidia/spark/rapids/GpuOverrides.scala
index 93584d486da..c08f578bfd6 100644
--- a/sql-plugin/src/main/scala/com/nvidia/spark/rapids/GpuOverrides.scala
+++ b/sql-plugin/src/main/scala/com/nvidia/spark/rapids/GpuOverrides.scala
@@ -438,7 +438,6 @@ object GpuOverrides extends Logging {
     "the Unicode version used by cuDF and the JVM may differ, resulting in some " +
     "corner-case characters not changing case correctly."
   val UTC_TIMEZONE_ID = ZoneId.of("UTC").normalized()
-  val SUPPORTED_TIMEZONE_IDS = Seq("UTC", "Etc/UTC").map(ZoneId.of)
   // Based on https://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html
   private[this] lazy val regexList: Seq[String] = Seq("\\", "\u0000", "\\x", "\t", "\n", "\r",
     "\f", "\\a", "\\e", "\\cx", "[", "]", "^", "&", ".", "*", "\\d", "\\D", "\\h", "\\H", "\\s",
diff --git a/sql-plugin/src/main/scala/org/apache/spark/sql/rapids/GpuStructsToJson.scala b/sql-plugin/src/main/scala/org/apache/spark/sql/rapids/GpuStructsToJson.scala
index a9bd4593e34..ea12a483c82 100644
--- a/sql-plugin/src/main/scala/org/apache/spark/sql/rapids/GpuStructsToJson.scala
+++ b/sql-plugin/src/main/scala/org/apache/spark/sql/rapids/GpuStructsToJson.scala
@@ -60,7 +60,7 @@ class GpuStructsToJsonMeta(
           // tracking issue is https://github.com/NVIDIA/spark-rapids/issues/9602
           willNotWorkOnGpu(s"Unsupported timestampFormat '$timestampFormat' in to_json")
       }
-      if (!GpuOverrides.SUPPORTED_TIMEZONE_IDS.contains(options.zoneId)) {
+      if (options.zoneId.normalized() != GpuOverrides.UTC_TIMEZONE_ID) {
         // we hard-code the timezone `Z` in GpuCast.castTimestampToJson
         // so we need to fall back if expr different timeZone is specified
         willNotWorkOnGpu(s"Unsupported timeZone '${options.zoneId}' in to_json")