These settings are available in system.settings and are autogenerated from the ClickHouse snapshot.
formatdatetime_e_with_space_padding
Formatter ‘%e’ in function ‘formatDateTime’ prints single-digit days with a leading space, e.g. ’ 2’ instead of ‘2’.
formatdatetime_format_without_leading_zeros
Formatters ‘%c’, ‘%l’ and ‘%k’ in function ‘formatDateTime’ print months and hours without leading zeros.
formatdatetime_parsedatetime_m_is_month_name
Formatter ‘%M’ in functions ‘formatDateTime’ and ‘parseDateTime’ print/parse the month name instead of minutes.