In some settings MySQL / MariaDB treats empty or null ‘datetime’ and ‘timestamp’ fields/columns as simply null, in others it writes out zeros (0s) like 0000-00-00 00:00:00. If you designed your own database, you probably know what you’re dealing with, already. But if you are working on someone else’s database, like migrating data to or from, or just doing development for it, for example, you may encounter the error “Incorrect datetime value: ‘0000-00-00 00:00:00’ for …