Ivan SPM created SPARK-23673:

             Summary: PySpark dayofweek does not conform with ISO 8601
                 Key: SPARK-23673
                 URL: https://issues.apache.org/jira/browse/SPARK-23673
             Project: Spark
          Issue Type: Bug
          Components: PySpark, Spark Core
    Affects Versions: 2.3.0
            Reporter: Ivan SPM

The new function dayofweek, that returns 1 = Sunday and 7 for Saturday, does 
not conform with ISO 8601, that states that the first day of the week is 
Monday, so 1 = Monday and 7 = Sunday. This behavior is also different from 
Pandas, that uses 0 = Monday and 6 = Sunday, but pandas is at least consistent 
with the ordering of ISO 8601.


(Also reported by Antonio Pedro Vieira (aps.vieir...@gmail.com))

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