SELECT  cast(toDateTime64('1965-12-12 12:12:12.123', 3, 'UTC') as Decimal64(3));
SELECT  cast(toDateTime64('1975-12-12 12:12:12.123', 3, 'UTC') as Decimal64(3));
SELECT  toDateTime64('1969-12-31 23:59:59.123', 3, 'UTC');