User is looking for a range of data in mind
The user came into the Image Gallery, looking for the pictures from her vacation in July 2007.
Realizing the current page shows only the latest pictures uploaded, the user brings her mouse over page 5.
The dates that show up for page 5 are still fairly recent, she jumps over the 10 and 15, and mouses-over page 20.
August 2 seems pretty close to July 2007, so she clicks on page 20.
She clicks on "next >", certain that her July vacation photos are on page 21.