A field that stores the time the row was inserted and doesn't change it on update

Keywords´╝Ü mysql timestamp

Question: 

According to what I've read in some posts such as the answer for this question

passing null value in a timestamp field will store the date when the row was created, but will update it when row is edited.

I want to do the same thing but without changing the date, and having that time stored as UTC, how can I do that?

Answers: