diff --git a/sql-plugin/src/main/scala/org/apache/spark/sql/catalyst/json/rapids/GpuJsonScan.scala b/sql-plugin/src/main/scala/org/apache/spark/sql/catalyst/json/rapids/GpuJsonScan.scala
index 38a1ec18524..79f8ee44792 100644
--- a/sql-plugin/src/main/scala/org/apache/spark/sql/catalyst/json/rapids/GpuJsonScan.scala
+++ b/sql-plugin/src/main/scala/org/apache/spark/sql/catalyst/json/rapids/GpuJsonScan.scala
@@ -119,6 +119,10 @@ object GpuJsonScan {
 
     val hasTimestamps = TrampolineUtil.dataTypeExistsRecursively(dt, _.isInstanceOf[TimestampType])
     if (hasTimestamps) {
+      GpuJsonToStructsShim.tagTimestampFormatSupport(meta,
+        GpuJsonUtils.optionalTimestampFormatInRead(parsedOptions))
+
+
       GpuJsonUtils.optionalTimestampFormatInRead(parsedOptions) match {
         case None | Some("yyyy-MM-dd'T'HH:mm:ss[.SSS][XXX]") =>
           // this is fine
diff --git a/sql-plugin/src/main/spark311/scala/com/nvidia/spark/rapids/shims/GpuJsonToStructsShim.scala b/sql-plugin/src/main/spark311/scala/com/nvidia/spark/rapids/shims/GpuJsonToStructsShim.scala
index 1580659c2b4..e5876e13ff1 100644
--- a/sql-plugin/src/main/spark311/scala/com/nvidia/spark/rapids/shims/GpuJsonToStructsShim.scala
+++ b/sql-plugin/src/main/spark311/scala/com/nvidia/spark/rapids/shims/GpuJsonToStructsShim.scala
@@ -37,7 +37,6 @@ object GpuJsonToStructsShim {
   def tagDateFormatSupport(meta: RapidsMeta[_, _, _], dateFormat: Option[String]): Unit = {
     dateFormat match {
       case None | Some("yyyy-MM-dd") =>
-        // this is fine
       case dateFormat =>
         meta.willNotWorkOnGpu(s"GpuJsonToStructs unsupported dateFormat $dateFormat")
     }
@@ -74,6 +73,9 @@ object GpuJsonToStructsShim {
     }
   }
 
+  def tagTimestampFormatSupport(meta: RapidsMeta[_, _, _],
+    timestampFormat: Option[String]): Unit = {}
+
   def castJsonStringToTimestamp(input: ColumnVector,
       options: Map[String, String]): ColumnVector = {
     withResource(Scalar.fromString(" ")) { space =>
diff --git a/sql-plugin/src/main/spark330/scala/com/nvidia/spark/rapids/shims/GpuJsonToStructsShim.scala b/sql-plugin/src/main/spark330/scala/com/nvidia/spark/rapids/shims/GpuJsonToStructsShim.scala
index 110cfbd6a76..3e723f93548 100644
--- a/sql-plugin/src/main/spark330/scala/com/nvidia/spark/rapids/shims/GpuJsonToStructsShim.scala
+++ b/sql-plugin/src/main/spark330/scala/com/nvidia/spark/rapids/shims/GpuJsonToStructsShim.scala
@@ -29,7 +29,7 @@ import ai.rapids.cudf.{ColumnVector, DType, Scalar}
 import com.nvidia.spark.rapids.Arm.withResource
 import com.nvidia.spark.rapids.{DateUtils, GpuCast, GpuOverrides, RapidsMeta}
 
-import org.apache.spark.sql.catalyst.json.GpuJsonUtils
+//import org.apache.spark.sql.catalyst.json.GpuJsonUtils
 import org.apache.spark.sql.rapids.ExceptionTimeParserPolicy
 
 object GpuJsonToStructsShim {
@@ -38,17 +38,11 @@ object GpuJsonToStructsShim {
   }
 
   def castJsonStringToDate(input: ColumnVector, options: Map[String, String]): ColumnVector = {
-    GpuJsonUtils.optionalDateFormatInRead(options) match {
-      case None =>
-        // legacy behavior
-        withResource(Scalar.fromString(" ")) { space =>
-          withResource(input.strip(space)) { trimmed =>
-            GpuCast.castStringToDate(trimmed)
-          }
-        }
-      case Some(f) =>
-        // from_json does not respect EXCEPTION policy
-        jsonStringToDate(input, f, failOnInvalid = false)
+    // dateFormat is ignored in Spark 3.3
+    withResource(Scalar.fromString(" ")) { space =>
+      withResource(input.strip(space)) { trimmed =>
+        GpuCast.castStringToDate(trimmed)
+      }
     }
   }
 
@@ -56,7 +50,7 @@ object GpuJsonToStructsShim {
   }
 
   def castJsonStringToDateFromScan(input: ColumnVector, dt: DType, dateFormat: Option[String],
-                                   failOnInvalid: Boolean): ColumnVector = {
+      failOnInvalid: Boolean): ColumnVector = {
     dateFormat match {
       case None =>
         // legacy behavior
@@ -64,8 +58,10 @@ object GpuJsonToStructsShim {
           GpuCast.castStringToDateAnsi(trimmed, ansiMode = false)
         }
       case Some(f) =>
-        jsonStringToDate(input, f, failOnInvalid &&
-          GpuOverrides.getTimeParserPolicy == ExceptionTimeParserPolicy)
+        withResource(input.strip()) { trimmed =>
+          jsonStringToDate(trimmed, f, failOnInvalid &&
+            GpuOverrides.getTimeParserPolicy == ExceptionTimeParserPolicy)
+        }
     }
   }
 
@@ -73,31 +69,23 @@ object GpuJsonToStructsShim {
                                failOnInvalid: Boolean): ColumnVector = {
     val regexRoot = dateFormatPattern
       .replace("yyyy", raw"\d{4}")
-      .replace("MM", raw"\d{2}")
-      .replace("dd", raw"\d{2}")
+      .replace("MM", raw"\d{1,2}")
+      .replace("dd", raw"\d{1,2}")
     val cudfFormat = DateUtils.toStrf(dateFormatPattern, parseString = true)
-    withResource(input.strip()) { input =>
-      GpuCast.convertDateOrNull(input, "^" + regexRoot + "$", cudfFormat, failOnInvalid)
-    }
+    GpuCast.convertDateOrNull(input, "^" + regexRoot + "$", cudfFormat, failOnInvalid)
   }
 
+  def tagTimestampFormatSupport(meta: RapidsMeta[_, _, _],
+      timestampFormat: Option[String]): Unit = {}
+
   def castJsonStringToTimestamp(input: ColumnVector,
                                 options: Map[String, String]): ColumnVector = {
-    options.get("timestampFormat") match {
-      case None =>
-        // legacy behavior
-        withResource(Scalar.fromString(" ")) { space =>
-          withResource(input.strip(space)) { trimmed =>
-            // from_json doesn't respect ansi mode
-            GpuCast.castStringToTimestamp(trimmed, ansiMode = false)
-          }
-        }
-      case Some("yyyy-MM-dd'T'HH:mm:ss[.SSS][XXX]") =>
-        GpuCast.convertTimestampOrNull(input,
-          "^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\\.[0-9]{1,6})?Z?$", "%Y-%m-%d")
-      case other =>
-        // should be unreachable due to GpuOverrides checks
-        throw new IllegalStateException(s"Unsupported timestampFormat $other")
+    // legacy behavior
+    withResource(Scalar.fromString(" ")) { space =>
+      withResource(input.strip(space)) { trimmed =>
+        // from_json doesn't respect ansi mode
+        GpuCast.castStringToTimestamp(trimmed, ansiMode = false)
+      }
     }
   }
 }
\ No newline at end of file
diff --git a/sql-plugin/src/main/spark340/scala/com/nvidia/spark/rapids/shims/GpuJsonToStructsShim.scala b/sql-plugin/src/main/spark340/scala/com/nvidia/spark/rapids/shims/GpuJsonToStructsShim.scala
index af5ba2674a3..8bd3681b01d 100644
--- a/sql-plugin/src/main/spark340/scala/com/nvidia/spark/rapids/shims/GpuJsonToStructsShim.scala
+++ b/sql-plugin/src/main/spark340/scala/com/nvidia/spark/rapids/shims/GpuJsonToStructsShim.scala
@@ -66,6 +66,7 @@ object GpuJsonToStructsShim {
     }
   }
 
+
   private def jsonStringToDate(input: ColumnVector, dateFormatPattern: String,
       failOnInvalid: Boolean): ColumnVector = {
     val regexRoot = dateFormatPattern
@@ -76,6 +77,16 @@ object GpuJsonToStructsShim {
     GpuCast.convertDateOrNull(input, "^" + regexRoot + "$", cudfFormat, failOnInvalid)
   }
 
+  def tagTimestampFormatSupport(meta: RapidsMeta[_, _, _],
+                                timestampFormat: Option[String]): Unit = {
+    timestampFormat match {
+      case None | Some("yyyy-MM-dd'T'HH:mm:ss[.SSS][XXX]") =>
+        // fine
+      case other =>
+        meta.willNotWorkOnGpu(s"Unsupported timestampFormat ${other}")
+    }
+  }
+
   def castJsonStringToTimestamp(input: ColumnVector,
       options: Map[String, String]): ColumnVector = {
     options.get("timestampFormat") match {