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https://issues.apache.org/jira/browse/CALCITE-1884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16095573#comment-16095573
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Julian Hyde commented on CALCITE-1884:
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What does Date.toString() print for the day before 1752-09-14? Are you seeing
it print 1752-09-02? If so, then it's shifted into old-style. But it's still
the day before 1752-09-14, its julian day number is one smaller, and frankly
it's just a problem with how java prints it.
SQL, which stays in new style, would print 1752-09-13.
> DateTimeUtils produces incorrect results for days before Gregorian cutovers
> ---------------------------------------------------------------------------
>
> Key: CALCITE-1884
> URL: https://issues.apache.org/jira/browse/CALCITE-1884
> Project: Calcite
> Issue Type: Bug
> Components: avatica
> Affects Versions: 1.13.0
> Reporter: Haohui Mai
> Assignee: Haohui Mai
>
> dateStringToUnixDate() / unixDateToString() do not return consistent result.
> The following test fails:
> {noformat}
> @Test public void testUnixDate() {
> int days = DateTimeUtils.dateStringToUnixDate("1500-04-30");
> assertEquals("1500-04-30", DateTimeUtils.unixDateToString(days));
> }
> {noformat}
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