laravel - 如何修改所有表的原始表属性值

Our company's DBA wants we set default value of timestamp table column to 1970-01-01 00:00:00, but we have already written many programs that using 0000-00-00 00:00:00 to check if sentence.

We have used Laravel 5 and MySQL 5.6

If there are any solution that we can change all original column value which belong to timestamp type to 0000-00-00 00:00:00 when the time is 1970-01-01 00:00:00?

Thank you very much.