maropu commented on a change in pull request #31624:
URL: https://github.com/apache/spark/pull/31624#discussion_r581569124



##########
File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
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@@ -49,8 +49,16 @@ object DateTimeUtils {
   final val TimeZoneUTC = TimeZone.getTimeZone("UTC")
 
   val TIMEZONE_OPTION = "timeZone"
+  val TIME_ZONE_ID = "(\\+|\\-)\\d:".r
 
-  def getZoneId(timeZoneId: String): ZoneId = ZoneId.of(timeZoneId, 
ZoneId.SHORT_IDS)
+  def getZoneId(timeZoneId: String): ZoneId = {

Review comment:
       This change affects all the datetime related functionalities, so I think 
we need more tests and document updates.




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