Thanksgiving is a US holiday, and not celebrated by Aruba, or anywhere else in the world.
However, we do like to accomodate our US guests and the hotels and restaurants offer many special Thanksgiving menus.
For those guests with kitchen facilites: the supermarkets carry Butterball turkeys, Stovetop stuffing and even sometimes fresh cranberries. Canned is always available.
The Hyatt usually offers a 'turkey to go' dinner, call for information.