v.23.4Backward Incompatible Changes

Formatter '%M' in formatDateTime() Now Displays Month Name Instead of Minutes

Official CH changelog text
Formatter '%M' in function formatDateTime() now prints the month name instead of the minutes. This makes the behavior consistent with MySQL. The previous behavior can be restored using setting "formatdatetime_parsedatetime_m_is_month_name = 0". #47246 (Robert Schulze).
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