MaxGekk commented on issue #23358: [SPARK-26424][SQL] Use java.time API in date/timestamp expressions URL: https://github.com/apache/spark/pull/23358#issuecomment-449831018 > Do we have an example to show the calendar problem? There is a shift in dates:  and number of days in year is different - **365.2425** days in Gregorian calendar vs **365.25** days in Julian calendar. So, if you have a day arithmetic, you get different results (in years) in the calendars.
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