What is the range of date time value that we can pass as an argument to MySQL UNIX_TIMESTAMP function?

The range of date time value that we can pass as an argument to MySQL UNIX_TIMESTAMP function is the same as the range of TIMESTAMP data type i.e. between ‘1970-01-01 00:00:01’ to ‘2038-01-19 08:44:07’. If we give the date time values in UNIX_TIMESTAMP function beyond or below TIMESTAMP range, MySQL will return 0 as output. It can be understood with the help of the following example −

mysql> select UNIX_TIMESTAMP('2038-01-19 08:44:07'); +---------------------------------------+ | UNIX_TIMESTAMP('2038-01-19 08:44:07') | +---------------------------------------+ | 2147483647                            | +---------------------------------------+ 1 row in set (0.00 sec) mysql> select UNIX_TIMESTAMP('2038-01-19 08:44:08'); +---------------------------------------+ | UNIX_TIMESTAMP('2038-01-19 08:44:08') | +---------------------------------------+ |                                   0   | +---------------------------------------+ 1 row in set (0.00 sec) mysql> select UNIX_TIMESTAMP('1969-01-01 05:10:00'); +---------------------------------------+ | UNIX_TIMESTAMP('1969-01-01 05:10:00') | +---------------------------------------+ |                                    0  | +---------------------------------------+ 1 row in set (0.00 sec)