PHP/MySQL date entering best practices?

I am making my first small CMS system which will have the ability to add news items. On the input for I want to have a Input field that people can input The date of the article. MY question is simply what is the best way to set up my input form and MySQL table field?

Do I do it as Text or set it up as a DATETIME field, I read a post about TIMESTAMP, I understand how this works but not how to implement it?

Thanks