MaxGekk commented on issue #27617: [SPARK-30865][SQL] Refactor DateTimeUtils URL: https://github.com/apache/spark/pull/27617#issuecomment-601838431 I have rebased this on the recent master, and got pretty interesting error: ``` org.scalatest.exceptions.GeneratorDrivenPropertyCheckFailedException: DateTimeException was thrown during property evaluation. Message: Invalid date 'February 29' as '1000' is not a leap year Occurred when passed generated values ( ) ``` in https://github.com/apache/spark/pull/27617#issuecomment-601824955 It seems https://github.com/apache/spark/blob/b27b3c91f113ec49ee87c877dac0a602849d76b1/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ArithmeticExpressionSuite.scala#L369 generates a timestamp which can be represented as local date-time in Julian calendar but not in Proleptic Gregorian calendar, see the error message. /cc @cloud-fan @HyukjinKwon
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