-- With implicit CAST
SELECT * FROM my_table 
    WHERE my_date BETWEEN '2021-06-01 01:12:00' AND '2021-06-30 23:59:59';
-- is EQUIVALENT to
SELECT * FROM my_table 
    WHERE my_date >= '2021-06-01 01:12:00' AND my_col <= '2021-06-30 23:59:59';