ng a slightly different implementation to
MariaDB 5.3. Since MariaDB 10.1, MariaDB has defaulted to the MySQL format, by
means of the --mysql56-temporal-format variable. The MySQL version requires
slightly more storage but has some advantages in permitting the eventual
support of negative dates, and in replication.

URL: https://mariadb.com/kb/en/microseconds-in-mariadb/https://mariadb.com/kb/en/microseconds-in-mariadb/