auto uncheck product attribute Each of my products has it own attribute with an expiration date. How can I auto unchecked the option when it expires? 

I know there is a module call scheduler which can help to auto publish and unpublished the node. How about the attribute?
Scheduler doesn't have any sort of integration with Ubercart. Unless there's existing module out there (I've never heard of it), you'll need a custom module that can hook into the attribute option form &amp; display/store your expiration for each option (via hook_form_alter) &amp; disable it when your option expires (via hook_cron).