National Pet Memorial Day falls on the second Sunday of September. This year, that will be September 11, 2005. It was established by the International Association of Pet Cemeteries (IAPC). Most pet cemeteries across the country observe this day.

It's really just a day to honor the memory of a pet you once had. It could be as simple as visiting the grave of a pet or sharing memories of the family pet at the dinner table.

Some people like to use this day to make a donation to a local animal charity, such as a shelter or rescue.

The folks at I Loved My Pet will let you create an online memorial to a recently departed pet. You can upload photos, write up a biography, and invite friends to share their memories.