Change upload date

[Fabrian]

Can anyone tell me how to edit the date that's displayed after a picture is added?  Maybe this is a silly question, but my images show the date added and some need to be changed in order to be accurate.

[Sami]

phpmyadmin => CPG DB => xxx_pictures => ctime

[Joachim Müller]

format: http://www.php.net/manual/en/function.time.php

[Fabrian]

Thanks!