How to solve the `invalid default value for 'post_date'` error on WordPress DB with MySQL when modifying the schema of wp_posts table

how-to-solve-wordpress-invalid-default-value.sql

SET SQL_MODE = '';
ALTER TABLE `wp_posts` CHANGE `post_date` `post_date` DATETIME  NOT NULL  DEFAULT '1970-01-01 00:00:00';
ALTER TABLE `wp_posts` CHANGE `post_date_gmt` `post_date_gmt` DATETIME  NOT NULL  DEFAULT '1970-01-01 00:00:00';
ALTER TABLE `wp_posts` CHANGE `post_modified` `post_modified` DATETIME  NOT NULL  DEFAULT '1970-01-01 00:00:00';
ALTER TABLE `wp_posts` CHANGE `post_modified_gmt` `post_modified_gmt` DATETIME  NOT NULL  DEFAULT '1970-01-01 00:00:00';

very nice thanks!

Sometimes first remove MySQL strict mode before the alter tables,

Check if strict mode is enabled:
SELECT @@GLOBAL.sql_mode;

Disable strict mode:
SET GLOBAL sql_mode = '';

Alter:

ALTER TABLE `wp_posts` CHANGE `post_date` `post_date` DATETIME  NOT NULL  DEFAULT '1970-01-01 00:00:00';
ALTER TABLE `wp_posts` CHANGE `post_date_gmt` `post_date_gmt` DATETIME  NOT NULL  DEFAULT '1970-01-01 00:00:00';
ALTER TABLE `wp_posts` CHANGE `post_modified` `post_modified` DATETIME  NOT NULL  DEFAULT '1970-01-01 00:00:00';
ALTER TABLE `wp_posts` CHANGE `post_modified_gmt` `post_modified_gmt` DATETIME  NOT NULL  DEFAULT '1970-01-01 00:00:00';

After altering table: (re-enable strict mode)
SET GLOBAL sql_mode = 'STRICT_TRANS_TABLES';

@asifulmamun Any difference from line 1: SET SQL_MODE = '';?

@asifulmamun Any difference from line 1: SET SQL_MODE = '';?

@kaorukobo
Ohh sorry, I didn't see before carefully