Change date below thumbnail to number of times view?

[Pizzaa]

Below each of my thumbail is shown a date that the file is uploaded such as "October 11, 2003",  I don't want that date to show below my thumbnails but instead show something like "Viewed 12 times". I've seen this done in a lot of galleries but I can't figure out how to do it.

Could anyone please help me?

[Casper]

The thumbnails in the album page should have the number of views. It is only in the category page, where there is just one thumbnail for the whole album, that it should show the date of last pic.